/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:25:47,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:25:47,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:25:47,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:25:47,569 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:25:47,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:25:47,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:25:47,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:25:47,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:25:47,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:25:47,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:25:47,601 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:25:47,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:25:47,601 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:25:47,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:25:47,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:25:47,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:25:47,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:25:47,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:25:47,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:25:47,602 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:25:47,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:25:47,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:25:47,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:25:47,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:25:47,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:25:47,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:25:47,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:25:47,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:25:47,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:25:47,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:25:47,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:25:47,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:25:47,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:25:47,604 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:25:47,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:25:47,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:25:47,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:25:47,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:25:47,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:25:47,884 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:25:47,885 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:25:47,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl [2021-07-09 17:25:47,885 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl' [2021-07-09 17:25:47,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:25:47,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:25:47,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:25:47,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:25:47,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:25:47,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:47" (1/1) ... [2021-07-09 17:25:47,954 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:47" (1/1) ... [2021-07-09 17:25:47,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:25:47,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:25:47,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:25:47,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:25:47,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:47" (1/1) ... [2021-07-09 17:25:47,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:47" (1/1) ... [2021-07-09 17:25:47,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:47" (1/1) ... [2021-07-09 17:25:47,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:47" (1/1) ... [2021-07-09 17:25:47,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:47" (1/1) ... [2021-07-09 17:25:47,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:47" (1/1) ... [2021-07-09 17:25:47,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:47" (1/1) ... [2021-07-09 17:25:47,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:25:47,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:25:47,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:25:47,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:25:47,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:25:48,039 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:25:48,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:25:48,039 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:25:48,039 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:25:48,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:25:48,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:25:48,040 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:25:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:25:48,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:25:48,040 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:25:48,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:25:48,298 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-09 17:25:48,299 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:25:48 BoogieIcfgContainer [2021-07-09 17:25:48,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:25:48,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:25:48,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:25:48,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:25:48,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:25:47" (1/2) ... [2021-07-09 17:25:48,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5986879 and model type chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:25:48, skipping insertion in model container [2021-07-09 17:25:48,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:25:48" (2/2) ... [2021-07-09 17:25:48,304 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-opt-symm.wvr.bpl [2021-07-09 17:25:48,308 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:25:48,308 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:25:48,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:25:48,308 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:25:48,345 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:25:48,369 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:25:48,382 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:25:48,383 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:25:48,383 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:25:48,383 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:25:48,383 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:25:48,383 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:25:48,383 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:25:48,383 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:25:48,389 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-07-09 17:25:48,400 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:25:48,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:48,405 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:48,406 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:48,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:48,409 INFO L82 PathProgramCache]: Analyzing trace with hash -715556201, now seen corresponding path program 1 times [2021-07-09 17:25:48,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:48,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943126384] [2021-07-09 17:25:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:48,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:48,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943126384] [2021-07-09 17:25:48,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943126384] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:48,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:48,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:25:48,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006463422] [2021-07-09 17:25:48,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:25:48,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:48,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:25:48,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:48,586 INFO L87 Difference]: Start difference. First operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:48,627 INFO L93 Difference]: Finished difference Result 31 states and 58 transitions. [2021-07-09 17:25:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:25:48,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:25:48,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:48,638 INFO L225 Difference]: With dead ends: 31 [2021-07-09 17:25:48,639 INFO L226 Difference]: Without dead ends: 31 [2021-07-09 17:25:48,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-07-09 17:25:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-07-09 17:25:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 58 transitions. [2021-07-09 17:25:48,668 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 58 transitions. Word has length 12 [2021-07-09 17:25:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:48,669 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 58 transitions. [2021-07-09 17:25:48,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 58 transitions. [2021-07-09 17:25:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:25:48,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:48,670 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:48,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:25:48,671 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:48,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash -434812415, now seen corresponding path program 2 times [2021-07-09 17:25:48,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:48,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496559056] [2021-07-09 17:25:48,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:48,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:48,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496559056] [2021-07-09 17:25:48,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496559056] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:48,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:48,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:25:48,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813483269] [2021-07-09 17:25:48,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:25:48,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:48,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:25:48,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:48,730 INFO L87 Difference]: Start difference. First operand 31 states and 58 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:48,757 INFO L93 Difference]: Finished difference Result 35 states and 66 transitions. [2021-07-09 17:25:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:25:48,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:25:48,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:48,759 INFO L225 Difference]: With dead ends: 35 [2021-07-09 17:25:48,759 INFO L226 Difference]: Without dead ends: 35 [2021-07-09 17:25:48,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-07-09 17:25:48,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-07-09 17:25:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 66 transitions. [2021-07-09 17:25:48,768 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 66 transitions. Word has length 12 [2021-07-09 17:25:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:48,768 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 66 transitions. [2021-07-09 17:25:48,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:48,768 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 66 transitions. [2021-07-09 17:25:48,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:25:48,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:48,769 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:48,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:25:48,770 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:48,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:48,771 INFO L82 PathProgramCache]: Analyzing trace with hash 114514857, now seen corresponding path program 1 times [2021-07-09 17:25:48,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:48,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299511040] [2021-07-09 17:25:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:48,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:48,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299511040] [2021-07-09 17:25:48,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299511040] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:48,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:48,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:25:48,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592157910] [2021-07-09 17:25:48,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:25:48,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:48,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:25:48,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:48,868 INFO L87 Difference]: Start difference. First operand 35 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:48,914 INFO L93 Difference]: Finished difference Result 56 states and 103 transitions. [2021-07-09 17:25:48,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:25:48,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:25:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:48,916 INFO L225 Difference]: With dead ends: 56 [2021-07-09 17:25:48,916 INFO L226 Difference]: Without dead ends: 54 [2021-07-09 17:25:48,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:25:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-07-09 17:25:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2021-07-09 17:25:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-07-09 17:25:48,928 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 13 [2021-07-09 17:25:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:48,932 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-07-09 17:25:48,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-07-09 17:25:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:25:48,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:48,933 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:48,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:25:48,933 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:48,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:48,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1879146489, now seen corresponding path program 2 times [2021-07-09 17:25:48,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:48,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389838214] [2021-07-09 17:25:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:49,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:49,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389838214] [2021-07-09 17:25:49,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389838214] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:49,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:49,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:25:49,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458825380] [2021-07-09 17:25:49,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:25:49,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:49,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:25:49,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:49,006 INFO L87 Difference]: Start difference. First operand 36 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:49,059 INFO L93 Difference]: Finished difference Result 52 states and 97 transitions. [2021-07-09 17:25:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:25:49,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:25:49,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:49,062 INFO L225 Difference]: With dead ends: 52 [2021-07-09 17:25:49,062 INFO L226 Difference]: Without dead ends: 52 [2021-07-09 17:25:49,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:25:49,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-07-09 17:25:49,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-07-09 17:25:49,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 70 transitions. [2021-07-09 17:25:49,071 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 70 transitions. Word has length 13 [2021-07-09 17:25:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:49,071 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 70 transitions. [2021-07-09 17:25:49,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 70 transitions. [2021-07-09 17:25:49,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:25:49,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:49,072 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:49,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:25:49,072 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:49,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:49,072 INFO L82 PathProgramCache]: Analyzing trace with hash -544555159, now seen corresponding path program 3 times [2021-07-09 17:25:49,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:49,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851225949] [2021-07-09 17:25:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:49,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:49,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851225949] [2021-07-09 17:25:49,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851225949] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:49,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:49,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:25:49,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480028238] [2021-07-09 17:25:49,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:25:49,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:49,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:25:49,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:49,141 INFO L87 Difference]: Start difference. First operand 37 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:49,196 INFO L93 Difference]: Finished difference Result 41 states and 78 transitions. [2021-07-09 17:25:49,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:25:49,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:25:49,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:49,197 INFO L225 Difference]: With dead ends: 41 [2021-07-09 17:25:49,197 INFO L226 Difference]: Without dead ends: 41 [2021-07-09 17:25:49,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:25:49,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-07-09 17:25:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-07-09 17:25:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 70 transitions. [2021-07-09 17:25:49,202 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 70 transitions. Word has length 13 [2021-07-09 17:25:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:49,202 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 70 transitions. [2021-07-09 17:25:49,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 70 transitions. [2021-07-09 17:25:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:25:49,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:49,203 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:49,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:25:49,203 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:49,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:49,203 INFO L82 PathProgramCache]: Analyzing trace with hash 434832868, now seen corresponding path program 1 times [2021-07-09 17:25:49,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:49,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438696834] [2021-07-09 17:25:49,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:49,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:49,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438696834] [2021-07-09 17:25:49,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438696834] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:49,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:49,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:25:49,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168974956] [2021-07-09 17:25:49,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:25:49,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:49,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:25:49,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:49,272 INFO L87 Difference]: Start difference. First operand 37 states and 70 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:49,287 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2021-07-09 17:25:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:25:49,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:25:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:49,288 INFO L225 Difference]: With dead ends: 63 [2021-07-09 17:25:49,288 INFO L226 Difference]: Without dead ends: 63 [2021-07-09 17:25:49,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:49,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-09 17:25:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2021-07-09 17:25:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 76 transitions. [2021-07-09 17:25:49,296 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 76 transitions. Word has length 13 [2021-07-09 17:25:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:49,296 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 76 transitions. [2021-07-09 17:25:49,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,298 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 76 transitions. [2021-07-09 17:25:49,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:25:49,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:49,299 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:49,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:25:49,299 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:49,299 INFO L82 PathProgramCache]: Analyzing trace with hash 373288736, now seen corresponding path program 2 times [2021-07-09 17:25:49,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:49,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609365207] [2021-07-09 17:25:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:49,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:49,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609365207] [2021-07-09 17:25:49,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609365207] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:25:49,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:25:49,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:25:49,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585896247] [2021-07-09 17:25:49,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:25:49,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:49,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:25:49,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:25:49,331 INFO L87 Difference]: Start difference. First operand 39 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:49,353 INFO L93 Difference]: Finished difference Result 44 states and 81 transitions. [2021-07-09 17:25:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:25:49,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:25:49,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:49,354 INFO L225 Difference]: With dead ends: 44 [2021-07-09 17:25:49,354 INFO L226 Difference]: Without dead ends: 39 [2021-07-09 17:25:49,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:25:49,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-09 17:25:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-07-09 17:25:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-07-09 17:25:49,358 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-07-09 17:25:49,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:49,358 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-07-09 17:25:49,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-07-09 17:25:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:49,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:49,361 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:49,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:25:49,361 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:49,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:49,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1182521280, now seen corresponding path program 1 times [2021-07-09 17:25:49,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:49,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269066741] [2021-07-09 17:25:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:49,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:49,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269066741] [2021-07-09 17:25:49,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269066741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:49,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222029182] [2021-07-09 17:25:49,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:49,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:25:49,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:49,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222029182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:49,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:49,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:25:49,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963128956] [2021-07-09 17:25:49,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:25:49,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:49,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:25:49,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:25:49,922 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:50,223 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-07-09 17:25:50,373 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-07-09 17:25:50,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:50,401 INFO L93 Difference]: Finished difference Result 71 states and 127 transitions. [2021-07-09 17:25:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:25:50,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:50,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:50,405 INFO L225 Difference]: With dead ends: 71 [2021-07-09 17:25:50,405 INFO L226 Difference]: Without dead ends: 58 [2021-07-09 17:25:50,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 648.3ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:25:50,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-07-09 17:25:50,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-07-09 17:25:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-07-09 17:25:50,414 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2021-07-09 17:25:50,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:50,414 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-07-09 17:25:50,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-07-09 17:25:50,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:50,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:50,415 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:50,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-07-09 17:25:50,616 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:50,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1118784670, now seen corresponding path program 2 times [2021-07-09 17:25:50,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:50,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250988895] [2021-07-09 17:25:50,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:50,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:50,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250988895] [2021-07-09 17:25:50,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250988895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:50,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672054178] [2021-07-09 17:25:50,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:50,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:50,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:50,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:25:50,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:51,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672054178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:51,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:51,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:25:51,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380970463] [2021-07-09 17:25:51,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:25:51,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:51,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:25:51,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:25:51,147 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:51,535 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-07-09 17:25:52,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:52,424 INFO L93 Difference]: Finished difference Result 101 states and 176 transitions. [2021-07-09 17:25:52,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:25:52,426 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:52,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:52,427 INFO L225 Difference]: With dead ends: 101 [2021-07-09 17:25:52,427 INFO L226 Difference]: Without dead ends: 80 [2021-07-09 17:25:52,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1391.4ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:25:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-09 17:25:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 44. [2021-07-09 17:25:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 86 transitions. [2021-07-09 17:25:52,430 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 86 transitions. Word has length 14 [2021-07-09 17:25:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:52,430 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 86 transitions. [2021-07-09 17:25:52,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 86 transitions. [2021-07-09 17:25:52,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:52,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:52,431 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:52,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 17:25:52,645 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:52,645 INFO L82 PathProgramCache]: Analyzing trace with hash 531039348, now seen corresponding path program 3 times [2021-07-09 17:25:52,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:52,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436816956] [2021-07-09 17:25:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:52,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:52,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436816956] [2021-07-09 17:25:52,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436816956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:52,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963807681] [2021-07-09 17:25:52,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:52,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:25:52,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:52,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:25:52,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:53,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963807681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:53,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:53,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:25:53,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517552030] [2021-07-09 17:25:53,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:25:53,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:53,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:25:53,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:25:53,079 INFO L87 Difference]: Start difference. First operand 44 states and 86 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:53,415 INFO L93 Difference]: Finished difference Result 68 states and 131 transitions. [2021-07-09 17:25:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:25:53,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:53,417 INFO L225 Difference]: With dead ends: 68 [2021-07-09 17:25:53,417 INFO L226 Difference]: Without dead ends: 57 [2021-07-09 17:25:53,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 463.2ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:25:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-07-09 17:25:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-07-09 17:25:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-07-09 17:25:53,419 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 14 [2021-07-09 17:25:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:53,419 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-07-09 17:25:53,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-07-09 17:25:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:53,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:53,419 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:53,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 17:25:53,635 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:53,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1865630678, now seen corresponding path program 4 times [2021-07-09 17:25:53,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:53,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97260302] [2021-07-09 17:25:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:53,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:53,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97260302] [2021-07-09 17:25:53,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97260302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:53,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162307316] [2021-07-09 17:25:53,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:53,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:53,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:53,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:25:53,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:54,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162307316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:54,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:54,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:25:54,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199312631] [2021-07-09 17:25:54,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:25:54,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:54,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:25:54,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:54,059 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:54,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:54,536 INFO L93 Difference]: Finished difference Result 99 states and 177 transitions. [2021-07-09 17:25:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:25:54,537 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:54,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:54,537 INFO L225 Difference]: With dead ends: 99 [2021-07-09 17:25:54,537 INFO L226 Difference]: Without dead ends: 80 [2021-07-09 17:25:54,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:25:54,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-09 17:25:54,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2021-07-09 17:25:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 96 transitions. [2021-07-09 17:25:54,539 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 96 transitions. Word has length 14 [2021-07-09 17:25:54,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:54,539 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 96 transitions. [2021-07-09 17:25:54,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:54,540 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 96 transitions. [2021-07-09 17:25:54,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:54,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:54,540 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:54,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:25:54,746 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:54,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1327775100, now seen corresponding path program 5 times [2021-07-09 17:25:54,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:54,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006869294] [2021-07-09 17:25:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:54,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:54,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006869294] [2021-07-09 17:25:54,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006869294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:54,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863879775] [2021-07-09 17:25:54,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:54,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:25:54,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:54,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:25:54,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:55,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863879775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:55,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:55,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:25:55,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136981331] [2021-07-09 17:25:55,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:25:55,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:55,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:25:55,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:55,095 INFO L87 Difference]: Start difference. First operand 48 states and 96 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:55,625 INFO L93 Difference]: Finished difference Result 110 states and 208 transitions. [2021-07-09 17:25:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:25:55,626 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:55,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:55,626 INFO L225 Difference]: With dead ends: 110 [2021-07-09 17:25:55,626 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 17:25:55,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 614.7ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:25:55,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 17:25:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-07-09 17:25:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2021-07-09 17:25:55,629 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 14 [2021-07-09 17:25:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:55,629 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2021-07-09 17:25:55,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2021-07-09 17:25:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:55,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:55,629 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:55,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 17:25:55,833 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:55,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:55,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1416837628, now seen corresponding path program 6 times [2021-07-09 17:25:55,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:55,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949424062] [2021-07-09 17:25:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:55,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:55,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949424062] [2021-07-09 17:25:55,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949424062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:55,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574284013] [2021-07-09 17:25:55,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:25:56,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:25:56,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:56,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:25:56,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:56,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574284013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:56,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:56,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:25:56,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572254933] [2021-07-09 17:25:56,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:25:56,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:56,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:25:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:25:56,251 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:56,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:56,607 INFO L93 Difference]: Finished difference Result 97 states and 182 transitions. [2021-07-09 17:25:56,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:25:56,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:56,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:56,609 INFO L225 Difference]: With dead ends: 97 [2021-07-09 17:25:56,609 INFO L226 Difference]: Without dead ends: 79 [2021-07-09 17:25:56,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 491.3ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:25:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-09 17:25:56,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2021-07-09 17:25:56,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 115 transitions. [2021-07-09 17:25:56,611 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 115 transitions. Word has length 14 [2021-07-09 17:25:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:56,611 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 115 transitions. [2021-07-09 17:25:56,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 115 transitions. [2021-07-09 17:25:56,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:56,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:56,612 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:56,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:56,812 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:56,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:56,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1543538338, now seen corresponding path program 7 times [2021-07-09 17:25:56,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:56,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921239249] [2021-07-09 17:25:56,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:56,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:56,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921239249] [2021-07-09 17:25:56,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921239249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:56,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100373185] [2021-07-09 17:25:56,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:56,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:25:56,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:57,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100373185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:57,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:57,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:25:57,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684495737] [2021-07-09 17:25:57,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:25:57,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:57,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:25:57,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:57,142 INFO L87 Difference]: Start difference. First operand 56 states and 115 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:57,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:57,518 INFO L93 Difference]: Finished difference Result 115 states and 207 transitions. [2021-07-09 17:25:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:25:57,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:57,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:57,519 INFO L225 Difference]: With dead ends: 115 [2021-07-09 17:25:57,519 INFO L226 Difference]: Without dead ends: 89 [2021-07-09 17:25:57,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 454.8ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:25:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-09 17:25:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2021-07-09 17:25:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 56 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 117 transitions. [2021-07-09 17:25:57,521 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 117 transitions. Word has length 14 [2021-07-09 17:25:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:57,521 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 117 transitions. [2021-07-09 17:25:57,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 117 transitions. [2021-07-09 17:25:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:57,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:57,521 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:57,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 17:25:57,738 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:57,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2081393916, now seen corresponding path program 8 times [2021-07-09 17:25:57,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:57,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59171791] [2021-07-09 17:25:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:57,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:57,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59171791] [2021-07-09 17:25:57,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59171791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:57,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639242819] [2021-07-09 17:25:57,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:57,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:57,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:57,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:25:57,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:58,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639242819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:58,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:58,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:25:58,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129934700] [2021-07-09 17:25:58,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:25:58,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:58,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:25:58,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:58,126 INFO L87 Difference]: Start difference. First operand 57 states and 117 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:58,418 INFO L93 Difference]: Finished difference Result 115 states and 215 transitions. [2021-07-09 17:25:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:25:58,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:58,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:58,419 INFO L225 Difference]: With dead ends: 115 [2021-07-09 17:25:58,419 INFO L226 Difference]: Without dead ends: 89 [2021-07-09 17:25:58,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:25:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-09 17:25:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2021-07-09 17:25:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:58,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 125 transitions. [2021-07-09 17:25:58,421 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 125 transitions. Word has length 14 [2021-07-09 17:25:58,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:58,421 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 125 transitions. [2021-07-09 17:25:58,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:58,421 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 125 transitions. [2021-07-09 17:25:58,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:25:58,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:58,421 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:58,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 17:25:58,637 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:58,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:58,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1119481792, now seen corresponding path program 9 times [2021-07-09 17:25:58,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:58,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030431589] [2021-07-09 17:25:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:58,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:58,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030431589] [2021-07-09 17:25:58,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030431589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:58,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228217762] [2021-07-09 17:25:58,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:58,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:25:58,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:58,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:25:58,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:59,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228217762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:59,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:59,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:25:59,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174647039] [2021-07-09 17:25:59,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:25:59,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:59,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:25:59,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:59,072 INFO L87 Difference]: Start difference. First operand 60 states and 125 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:59,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:59,895 INFO L93 Difference]: Finished difference Result 142 states and 277 transitions. [2021-07-09 17:25:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:25:59,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:25:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:59,897 INFO L225 Difference]: With dead ends: 142 [2021-07-09 17:25:59,897 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:25:59,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 948.8ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:59,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:25:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2021-07-09 17:25:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2021-07-09 17:25:59,902 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 14 [2021-07-09 17:25:59,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:59,902 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2021-07-09 17:25:59,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2021-07-09 17:25:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:25:59,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:59,903 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:00,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:00,113 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1559031433, now seen corresponding path program 10 times [2021-07-09 17:26:00,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:00,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19454615] [2021-07-09 17:26:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:00,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:00,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19454615] [2021-07-09 17:26:00,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19454615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:00,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201155190] [2021-07-09 17:26:00,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:00,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:00,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:00,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:00,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:00,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201155190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:00,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:00,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:26:00,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376091130] [2021-07-09 17:26:00,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:26:00,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:00,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:26:00,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:26:00,241 INFO L87 Difference]: Start difference. First operand 70 states and 148 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:00,290 INFO L93 Difference]: Finished difference Result 102 states and 207 transitions. [2021-07-09 17:26:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:26:00,290 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:00,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:00,291 INFO L225 Difference]: With dead ends: 102 [2021-07-09 17:26:00,291 INFO L226 Difference]: Without dead ends: 102 [2021-07-09 17:26:00,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-09 17:26:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2021-07-09 17:26:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-07-09 17:26:00,294 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-07-09 17:26:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:00,294 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-07-09 17:26:00,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-07-09 17:26:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:00,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:00,294 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:00,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 17:26:00,501 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:00,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:00,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1022375235, now seen corresponding path program 11 times [2021-07-09 17:26:00,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:00,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041509700] [2021-07-09 17:26:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:00,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:00,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041509700] [2021-07-09 17:26:00,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041509700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:00,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746571903] [2021-07-09 17:26:00,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:00,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:00,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:00,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:00,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:00,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746571903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:00,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:00,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:26:00,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695828258] [2021-07-09 17:26:00,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:26:00,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:00,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:26:00,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:00,667 INFO L87 Difference]: Start difference. First operand 71 states and 151 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:00,929 INFO L93 Difference]: Finished difference Result 111 states and 225 transitions. [2021-07-09 17:26:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:26:00,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:00,941 INFO L225 Difference]: With dead ends: 111 [2021-07-09 17:26:00,941 INFO L226 Difference]: Without dead ends: 111 [2021-07-09 17:26:00,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-09 17:26:00,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2021-07-09 17:26:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-07-09 17:26:00,943 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-07-09 17:26:00,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:00,944 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-07-09 17:26:00,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-07-09 17:26:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:00,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:00,944 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:01,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:01,162 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1144507010, now seen corresponding path program 12 times [2021-07-09 17:26:01,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:01,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213549108] [2021-07-09 17:26:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:01,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:01,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213549108] [2021-07-09 17:26:01,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213549108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:01,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621773011] [2021-07-09 17:26:01,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:01,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:26:01,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:01,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:01,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:01,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621773011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:01,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:01,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:26:01,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334828743] [2021-07-09 17:26:01,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:26:01,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:01,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:26:01,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:01,361 INFO L87 Difference]: Start difference. First operand 71 states and 151 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:01,829 INFO L93 Difference]: Finished difference Result 131 states and 251 transitions. [2021-07-09 17:26:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:26:01,830 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:01,830 INFO L225 Difference]: With dead ends: 131 [2021-07-09 17:26:01,830 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:26:01,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 505.7ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:01,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:26:01,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 79. [2021-07-09 17:26:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 78 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:01,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 169 transitions. [2021-07-09 17:26:01,833 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 169 transitions. Word has length 15 [2021-07-09 17:26:01,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:01,833 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 169 transitions. [2021-07-09 17:26:01,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 169 transitions. [2021-07-09 17:26:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:01,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:01,834 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:02,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:02,041 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:02,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:02,041 INFO L82 PathProgramCache]: Analyzing trace with hash -225639483, now seen corresponding path program 13 times [2021-07-09 17:26:02,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:02,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36454156] [2021-07-09 17:26:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:02,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:02,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36454156] [2021-07-09 17:26:02,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36454156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:02,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980136349] [2021-07-09 17:26:02,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:02,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:02,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:02,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980136349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:02,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:02,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:02,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660677966] [2021-07-09 17:26:02,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:02,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:02,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:02,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:02,208 INFO L87 Difference]: Start difference. First operand 79 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:02,430 INFO L93 Difference]: Finished difference Result 141 states and 275 transitions. [2021-07-09 17:26:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:02,430 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:02,431 INFO L225 Difference]: With dead ends: 141 [2021-07-09 17:26:02,431 INFO L226 Difference]: Without dead ends: 141 [2021-07-09 17:26:02,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-09 17:26:02,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 79. [2021-07-09 17:26:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 78 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 169 transitions. [2021-07-09 17:26:02,434 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 169 transitions. Word has length 15 [2021-07-09 17:26:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:02,434 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 169 transitions. [2021-07-09 17:26:02,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 169 transitions. [2021-07-09 17:26:02,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:02,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:02,435 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:02,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 17:26:02,645 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash -432834720, now seen corresponding path program 14 times [2021-07-09 17:26:02,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:02,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730080607] [2021-07-09 17:26:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:02,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:02,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730080607] [2021-07-09 17:26:02,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730080607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:02,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272274605] [2021-07-09 17:26:02,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:02,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:02,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:02,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:02,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:02,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272274605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:02,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:02,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:02,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205386587] [2021-07-09 17:26:02,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:02,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:02,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:02,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:02,851 INFO L87 Difference]: Start difference. First operand 79 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:03,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:03,048 INFO L93 Difference]: Finished difference Result 116 states and 229 transitions. [2021-07-09 17:26:03,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:26:03,048 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:03,049 INFO L225 Difference]: With dead ends: 116 [2021-07-09 17:26:03,049 INFO L226 Difference]: Without dead ends: 114 [2021-07-09 17:26:03,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:03,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-09 17:26:03,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-07-09 17:26:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.1621621621621623) internal successors, (160), 74 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 160 transitions. [2021-07-09 17:26:03,051 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 160 transitions. Word has length 15 [2021-07-09 17:26:03,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:03,051 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 160 transitions. [2021-07-09 17:26:03,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:03,051 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 160 transitions. [2021-07-09 17:26:03,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:03,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:03,052 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:03,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:03,265 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:03,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:03,265 INFO L82 PathProgramCache]: Analyzing trace with hash 250671963, now seen corresponding path program 15 times [2021-07-09 17:26:03,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:03,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639836217] [2021-07-09 17:26:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:03,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:03,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639836217] [2021-07-09 17:26:03,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639836217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:03,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88963056] [2021-07-09 17:26:03,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:03,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:26:03,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:03,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:03,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:03,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88963056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:03,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:03,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:03,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155822205] [2021-07-09 17:26:03,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:03,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:03,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:03,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:03,423 INFO L87 Difference]: Start difference. First operand 75 states and 160 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:03,564 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2021-07-09 17:26:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:03,565 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:03,565 INFO L225 Difference]: With dead ends: 107 [2021-07-09 17:26:03,565 INFO L226 Difference]: Without dead ends: 104 [2021-07-09 17:26:03,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-09 17:26:03,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-07-09 17:26:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 74 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:03,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 159 transitions. [2021-07-09 17:26:03,567 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 159 transitions. Word has length 15 [2021-07-09 17:26:03,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:03,567 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 159 transitions. [2021-07-09 17:26:03,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 159 transitions. [2021-07-09 17:26:03,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:03,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:03,568 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:03,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:03,768 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:03,769 INFO L82 PathProgramCache]: Analyzing trace with hash 901756610, now seen corresponding path program 16 times [2021-07-09 17:26:03,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:03,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791762391] [2021-07-09 17:26:03,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:03,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:03,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791762391] [2021-07-09 17:26:03,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791762391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:03,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843635848] [2021-07-09 17:26:03,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:03,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:03,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:03,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:03,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:03,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843635848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:03,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:03,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:03,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554320871] [2021-07-09 17:26:03,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:03,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:03,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:03,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:03,956 INFO L87 Difference]: Start difference. First operand 75 states and 159 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:04,123 INFO L93 Difference]: Finished difference Result 100 states and 204 transitions. [2021-07-09 17:26:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:26:04,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:04,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:04,124 INFO L225 Difference]: With dead ends: 100 [2021-07-09 17:26:04,124 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 17:26:04,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:04,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 17:26:04,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2021-07-09 17:26:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-07-09 17:26:04,126 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-07-09 17:26:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:04,126 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-07-09 17:26:04,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,126 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-07-09 17:26:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:04,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:04,127 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:04,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:04,330 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:04,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:04,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2062611033, now seen corresponding path program 17 times [2021-07-09 17:26:04,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:04,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196542521] [2021-07-09 17:26:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:04,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:04,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196542521] [2021-07-09 17:26:04,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196542521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:04,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929713491] [2021-07-09 17:26:04,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:04,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:04,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:04,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:04,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:04,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929713491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:04,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:04,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:26:04,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183838059] [2021-07-09 17:26:04,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:26:04,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:04,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:26:04,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:04,466 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:04,575 INFO L93 Difference]: Finished difference Result 82 states and 172 transitions. [2021-07-09 17:26:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:26:04,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:04,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:04,577 INFO L225 Difference]: With dead ends: 82 [2021-07-09 17:26:04,577 INFO L226 Difference]: Without dead ends: 82 [2021-07-09 17:26:04,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-09 17:26:04,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-07-09 17:26:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-07-09 17:26:04,584 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-07-09 17:26:04,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:04,584 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-07-09 17:26:04,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,584 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-07-09 17:26:04,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:04,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:04,584 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:04,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:04,797 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:04,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:04,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1265875281, now seen corresponding path program 18 times [2021-07-09 17:26:04,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:04,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494301332] [2021-07-09 17:26:04,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:04,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:04,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494301332] [2021-07-09 17:26:04,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494301332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:04,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962517484] [2021-07-09 17:26:04,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:04,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:26:04,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:04,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:04,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:04,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962517484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:04,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:04,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:04,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700377945] [2021-07-09 17:26:04,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:04,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:04,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:04,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:04,935 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:04,986 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2021-07-09 17:26:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:26:04,987 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:04,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:04,987 INFO L225 Difference]: With dead ends: 88 [2021-07-09 17:26:04,987 INFO L226 Difference]: Without dead ends: 88 [2021-07-09 17:26:04,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-09 17:26:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-07-09 17:26:04,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-07-09 17:26:04,989 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-07-09 17:26:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:04,989 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-07-09 17:26:04,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-07-09 17:26:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:04,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:04,989 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:05,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:05,193 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:05,193 INFO L82 PathProgramCache]: Analyzing trace with hash -978325046, now seen corresponding path program 19 times [2021-07-09 17:26:05,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:05,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352404703] [2021-07-09 17:26:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:05,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:05,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352404703] [2021-07-09 17:26:05,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352404703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:05,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092918528] [2021-07-09 17:26:05,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:05,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:05,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:05,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092918528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:05,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:05,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:05,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002818984] [2021-07-09 17:26:05,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:05,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:05,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:05,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:05,370 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:05,411 INFO L93 Difference]: Finished difference Result 79 states and 164 transitions. [2021-07-09 17:26:05,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:26:05,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:05,412 INFO L225 Difference]: With dead ends: 79 [2021-07-09 17:26:05,412 INFO L226 Difference]: Without dead ends: 79 [2021-07-09 17:26:05,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-09 17:26:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-07-09 17:26:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 144 transitions. [2021-07-09 17:26:05,414 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 144 transitions. Word has length 15 [2021-07-09 17:26:05,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:05,414 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 144 transitions. [2021-07-09 17:26:05,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,414 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 144 transitions. [2021-07-09 17:26:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:05,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:05,415 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:05,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:05,629 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:05,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:05,629 INFO L82 PathProgramCache]: Analyzing trace with hash 367867078, now seen corresponding path program 20 times [2021-07-09 17:26:05,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:05,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619373342] [2021-07-09 17:26:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:05,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:05,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619373342] [2021-07-09 17:26:05,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619373342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:05,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916779146] [2021-07-09 17:26:05,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:05,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:05,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:05,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:05,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916779146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:05,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:05,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:05,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131184261] [2021-07-09 17:26:05,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:05,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:05,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:05,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:05,775 INFO L87 Difference]: Start difference. First operand 69 states and 144 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:05,931 INFO L93 Difference]: Finished difference Result 124 states and 235 transitions. [2021-07-09 17:26:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:26:05,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:05,932 INFO L225 Difference]: With dead ends: 124 [2021-07-09 17:26:05,932 INFO L226 Difference]: Without dead ends: 124 [2021-07-09 17:26:05,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:05,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-07-09 17:26:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 71. [2021-07-09 17:26:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-07-09 17:26:05,934 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-07-09 17:26:05,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:05,934 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-07-09 17:26:05,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,934 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-07-09 17:26:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:05,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:05,935 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:06,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-09 17:26:06,141 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:06,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:06,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1862953191, now seen corresponding path program 21 times [2021-07-09 17:26:06,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:06,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975161966] [2021-07-09 17:26:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:06,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:06,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975161966] [2021-07-09 17:26:06,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975161966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:06,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500126966] [2021-07-09 17:26:06,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:06,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:26:06,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:06,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:06,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:06,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500126966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:06,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:06,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:06,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765202796] [2021-07-09 17:26:06,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:06,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:06,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:06,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:06,353 INFO L87 Difference]: Start difference. First operand 71 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:06,437 INFO L93 Difference]: Finished difference Result 114 states and 220 transitions. [2021-07-09 17:26:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:06,438 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:06,438 INFO L225 Difference]: With dead ends: 114 [2021-07-09 17:26:06,438 INFO L226 Difference]: Without dead ends: 108 [2021-07-09 17:26:06,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:06,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-09 17:26:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-07-09 17:26:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1728395061728394) internal successors, (176), 81 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 176 transitions. [2021-07-09 17:26:06,440 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 176 transitions. Word has length 15 [2021-07-09 17:26:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:06,441 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 176 transitions. [2021-07-09 17:26:06,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 176 transitions. [2021-07-09 17:26:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:06,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:06,441 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:06,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 17:26:06,653 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:06,653 INFO L82 PathProgramCache]: Analyzing trace with hash -169988500, now seen corresponding path program 22 times [2021-07-09 17:26:06,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:06,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322120217] [2021-07-09 17:26:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:06,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:06,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322120217] [2021-07-09 17:26:06,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322120217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:06,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25068718] [2021-07-09 17:26:06,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:06,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:06,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:06,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:06,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:06,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25068718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:06,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:06,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:06,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788301013] [2021-07-09 17:26:06,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:06,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:06,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:06,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:06,786 INFO L87 Difference]: Start difference. First operand 82 states and 176 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:06,831 INFO L93 Difference]: Finished difference Result 96 states and 201 transitions. [2021-07-09 17:26:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:26:06,832 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:06,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:06,832 INFO L225 Difference]: With dead ends: 96 [2021-07-09 17:26:06,832 INFO L226 Difference]: Without dead ends: 96 [2021-07-09 17:26:06,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-09 17:26:06,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2021-07-09 17:26:06,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.15) internal successors, (172), 80 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 172 transitions. [2021-07-09 17:26:06,836 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 172 transitions. Word has length 15 [2021-07-09 17:26:06,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:06,836 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 172 transitions. [2021-07-09 17:26:06,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,836 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 172 transitions. [2021-07-09 17:26:06,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:06,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:06,836 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:07,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:07,053 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:07,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:07,053 INFO L82 PathProgramCache]: Analyzing trace with hash 961923201, now seen corresponding path program 23 times [2021-07-09 17:26:07,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:07,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166896307] [2021-07-09 17:26:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:07,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:07,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166896307] [2021-07-09 17:26:07,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166896307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256190026] [2021-07-09 17:26:07,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:07,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:07,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:07,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:07,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:07,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256190026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:07,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:07,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831768217] [2021-07-09 17:26:07,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:07,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:07,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:07,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:07,186 INFO L87 Difference]: Start difference. First operand 81 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:07,225 INFO L93 Difference]: Finished difference Result 91 states and 190 transitions. [2021-07-09 17:26:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:26:07,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:07,225 INFO L225 Difference]: With dead ends: 91 [2021-07-09 17:26:07,226 INFO L226 Difference]: Without dead ends: 91 [2021-07-09 17:26:07,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:07,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-09 17:26:07,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2021-07-09 17:26:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-07-09 17:26:07,228 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-07-09 17:26:07,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:07,228 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-07-09 17:26:07,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,228 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-07-09 17:26:07,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:07,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:07,228 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:07,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 17:26:07,437 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1551463716, now seen corresponding path program 24 times [2021-07-09 17:26:07,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:07,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299074086] [2021-07-09 17:26:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:07,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:07,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299074086] [2021-07-09 17:26:07,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299074086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20356376] [2021-07-09 17:26:07,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:07,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:26:07,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:07,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:07,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:07,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20356376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:07,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:07,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268543348] [2021-07-09 17:26:07,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:07,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:07,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:07,616 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:07,669 INFO L93 Difference]: Finished difference Result 84 states and 177 transitions. [2021-07-09 17:26:07,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:26:07,670 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:07,670 INFO L225 Difference]: With dead ends: 84 [2021-07-09 17:26:07,670 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 17:26:07,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:07,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 17:26:07,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2021-07-09 17:26:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-07-09 17:26:07,672 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-07-09 17:26:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:07,672 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-07-09 17:26:07,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-07-09 17:26:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:07,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:07,673 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:07,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:07,881 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:07,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:07,881 INFO L82 PathProgramCache]: Analyzing trace with hash 930413889, now seen corresponding path program 25 times [2021-07-09 17:26:07,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:07,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075001017] [2021-07-09 17:26:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:07,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:07,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075001017] [2021-07-09 17:26:07,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075001017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860166187] [2021-07-09 17:26:07,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:07,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:08,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860166187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:08,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:08,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:08,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088318002] [2021-07-09 17:26:08,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:08,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:08,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:08,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:08,074 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:08,181 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-07-09 17:26:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:08,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:08,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:08,182 INFO L225 Difference]: With dead ends: 101 [2021-07-09 17:26:08,182 INFO L226 Difference]: Without dead ends: 101 [2021-07-09 17:26:08,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:08,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-09 17:26:08,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2021-07-09 17:26:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-07-09 17:26:08,184 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-07-09 17:26:08,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:08,185 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-07-09 17:26:08,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-07-09 17:26:08,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:08,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:08,185 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:08,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 17:26:08,393 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:08,393 INFO L82 PathProgramCache]: Analyzing trace with hash -742071201, now seen corresponding path program 26 times [2021-07-09 17:26:08,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:08,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490601331] [2021-07-09 17:26:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:08,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:08,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490601331] [2021-07-09 17:26:08,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490601331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:08,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475816743] [2021-07-09 17:26:08,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:08,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:08,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:08,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:08,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:08,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475816743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:08,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:08,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:08,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412405527] [2021-07-09 17:26:08,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:08,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:08,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:08,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:08,583 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:08,656 INFO L93 Difference]: Finished difference Result 89 states and 182 transitions. [2021-07-09 17:26:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:26:08,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:08,657 INFO L225 Difference]: With dead ends: 89 [2021-07-09 17:26:08,657 INFO L226 Difference]: Without dead ends: 83 [2021-07-09 17:26:08,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-09 17:26:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-07-09 17:26:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-07-09 17:26:08,659 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-07-09 17:26:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:08,659 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-07-09 17:26:08,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-07-09 17:26:08,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:08,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:08,659 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:08,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-09 17:26:08,869 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:08,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:08,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1373313029, now seen corresponding path program 27 times [2021-07-09 17:26:08,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:08,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276236084] [2021-07-09 17:26:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:08,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:08,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276236084] [2021-07-09 17:26:08,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276236084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:08,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409831898] [2021-07-09 17:26:08,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:08,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:26:08,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:08,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:08,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:09,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409831898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:09,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:09,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:09,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756701433] [2021-07-09 17:26:09,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:09,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:09,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:09,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:09,069 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:09,294 INFO L93 Difference]: Finished difference Result 122 states and 241 transitions. [2021-07-09 17:26:09,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:26:09,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:09,294 INFO L225 Difference]: With dead ends: 122 [2021-07-09 17:26:09,294 INFO L226 Difference]: Without dead ends: 122 [2021-07-09 17:26:09,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 304.8ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:09,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-09 17:26:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 80. [2021-07-09 17:26:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-07-09 17:26:09,297 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-07-09 17:26:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:09,297 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-07-09 17:26:09,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-07-09 17:26:09,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:09,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:09,297 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:09,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:09,513 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:09,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:09,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1660863264, now seen corresponding path program 28 times [2021-07-09 17:26:09,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:09,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188477255] [2021-07-09 17:26:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:09,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:09,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188477255] [2021-07-09 17:26:09,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188477255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:09,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421882783] [2021-07-09 17:26:09,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:09,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:09,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:09,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:09,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421882783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:09,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:09,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:09,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938429976] [2021-07-09 17:26:09,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:09,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:09,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:09,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:09,664 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:09,902 INFO L93 Difference]: Finished difference Result 152 states and 289 transitions. [2021-07-09 17:26:09,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:09,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:09,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:09,903 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:26:09,903 INFO L226 Difference]: Without dead ends: 152 [2021-07-09 17:26:09,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 221.8ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-09 17:26:09,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 80. [2021-07-09 17:26:09,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-07-09 17:26:09,905 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-07-09 17:26:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:09,905 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-07-09 17:26:09,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,905 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-07-09 17:26:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:09,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:09,906 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:10,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 17:26:10,118 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:10,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:10,118 INFO L82 PathProgramCache]: Analyzing trace with hash -299172061, now seen corresponding path program 29 times [2021-07-09 17:26:10,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:10,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767284249] [2021-07-09 17:26:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:10,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:10,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767284249] [2021-07-09 17:26:10,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767284249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:10,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453177984] [2021-07-09 17:26:10,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:10,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:10,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:10,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:10,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:10,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453177984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:10,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:10,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:10,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607676578] [2021-07-09 17:26:10,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:10,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:10,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:10,340 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:10,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:10,597 INFO L93 Difference]: Finished difference Result 129 states and 251 transitions. [2021-07-09 17:26:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:26:10,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:10,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:10,598 INFO L225 Difference]: With dead ends: 129 [2021-07-09 17:26:10,598 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:26:10,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:26:10,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 80. [2021-07-09 17:26:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-07-09 17:26:10,600 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-07-09 17:26:10,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:10,600 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-07-09 17:26:10,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-07-09 17:26:10,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:10,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:10,600 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:10,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 17:26:10,801 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:10,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:10,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1962853544, now seen corresponding path program 30 times [2021-07-09 17:26:10,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:10,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064420280] [2021-07-09 17:26:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:10,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:10,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064420280] [2021-07-09 17:26:10,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064420280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:10,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127985483] [2021-07-09 17:26:10,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:10,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:26:10,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:10,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:10,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:10,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127985483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:10,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:10,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:10,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075602547] [2021-07-09 17:26:10,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:10,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:10,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:10,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:10,931 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:11,024 INFO L93 Difference]: Finished difference Result 123 states and 249 transitions. [2021-07-09 17:26:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:11,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:11,025 INFO L225 Difference]: With dead ends: 123 [2021-07-09 17:26:11,025 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:26:11,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:26:11,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 80. [2021-07-09 17:26:11,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-07-09 17:26:11,027 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-07-09 17:26:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:11,027 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-07-09 17:26:11,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-07-09 17:26:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:11,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:11,028 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:11,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:11,245 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:11,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:11,246 INFO L82 PathProgramCache]: Analyzing trace with hash 207174205, now seen corresponding path program 31 times [2021-07-09 17:26:11,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:11,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651983829] [2021-07-09 17:26:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:11,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:11,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651983829] [2021-07-09 17:26:11,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651983829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:11,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890452387] [2021-07-09 17:26:11,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:11,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:11,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890452387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:11,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:11,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:26:11,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441647300] [2021-07-09 17:26:11,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:26:11,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:11,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:26:11,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:26:11,425 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:11,528 INFO L93 Difference]: Finished difference Result 107 states and 214 transitions. [2021-07-09 17:26:11,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:26:11,528 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:11,528 INFO L225 Difference]: With dead ends: 107 [2021-07-09 17:26:11,528 INFO L226 Difference]: Without dead ends: 96 [2021-07-09 17:26:11,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-09 17:26:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2021-07-09 17:26:11,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.135135135135135) internal successors, (158), 74 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 158 transitions. [2021-07-09 17:26:11,530 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 158 transitions. Word has length 15 [2021-07-09 17:26:11,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:11,530 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 158 transitions. [2021-07-09 17:26:11,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,531 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 158 transitions. [2021-07-09 17:26:11,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:26:11,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:11,531 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:11,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 17:26:11,731 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:11,732 INFO L82 PathProgramCache]: Analyzing trace with hash 868761956, now seen corresponding path program 32 times [2021-07-09 17:26:11,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:11,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325957240] [2021-07-09 17:26:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:11,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:11,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325957240] [2021-07-09 17:26:11,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325957240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:11,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79808151] [2021-07-09 17:26:11,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:11,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:11,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:11,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:11,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:11,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79808151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:11,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:11,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:26:11,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874052914] [2021-07-09 17:26:11,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:26:11,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:11,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:26:11,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:26:11,846 INFO L87 Difference]: Start difference. First operand 75 states and 158 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:11,899 INFO L93 Difference]: Finished difference Result 110 states and 222 transitions. [2021-07-09 17:26:11,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:26:11,900 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:26:11,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:11,900 INFO L225 Difference]: With dead ends: 110 [2021-07-09 17:26:11,900 INFO L226 Difference]: Without dead ends: 110 [2021-07-09 17:26:11,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-09 17:26:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2021-07-09 17:26:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2021-07-09 17:26:11,903 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 15 [2021-07-09 17:26:11,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:11,903 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2021-07-09 17:26:11,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2021-07-09 17:26:11,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:11,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:11,904 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:12,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-09 17:26:12,113 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:12,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:12,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1907254775, now seen corresponding path program 33 times [2021-07-09 17:26:12,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:12,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856273277] [2021-07-09 17:26:12,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:12,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:12,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856273277] [2021-07-09 17:26:12,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856273277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:12,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225325925] [2021-07-09 17:26:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:12,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:26:12,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:12,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:12,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225325925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:12,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:12,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:12,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082120740] [2021-07-09 17:26:12,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:12,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:12,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:12,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:12,575 INFO L87 Difference]: Start difference. First operand 73 states and 151 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:12,863 INFO L93 Difference]: Finished difference Result 138 states and 265 transitions. [2021-07-09 17:26:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:12,863 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:12,863 INFO L225 Difference]: With dead ends: 138 [2021-07-09 17:26:12,863 INFO L226 Difference]: Without dead ends: 123 [2021-07-09 17:26:12,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 542.0ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:12,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-09 17:26:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2021-07-09 17:26:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 153 transitions. [2021-07-09 17:26:12,866 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 153 transitions. Word has length 16 [2021-07-09 17:26:12,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:12,866 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 153 transitions. [2021-07-09 17:26:12,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,866 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 153 transitions. [2021-07-09 17:26:12,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:12,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:12,866 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:13,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:13,067 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:13,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:13,067 INFO L82 PathProgramCache]: Analyzing trace with hash 233295193, now seen corresponding path program 34 times [2021-07-09 17:26:13,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:13,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527062351] [2021-07-09 17:26:13,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:13,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:13,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527062351] [2021-07-09 17:26:13,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527062351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:13,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992353850] [2021-07-09 17:26:13,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:13,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:13,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:13,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992353850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:13,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:13,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:26:13,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898270623] [2021-07-09 17:26:13,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:26:13,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:13,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:26:13,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:13,524 INFO L87 Difference]: Start difference. First operand 74 states and 153 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:14,159 INFO L93 Difference]: Finished difference Result 138 states and 266 transitions. [2021-07-09 17:26:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:14,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:14,160 INFO L225 Difference]: With dead ends: 138 [2021-07-09 17:26:14,160 INFO L226 Difference]: Without dead ends: 125 [2021-07-09 17:26:14,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 762.7ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:26:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-09 17:26:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2021-07-09 17:26:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-07-09 17:26:14,162 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 16 [2021-07-09 17:26:14,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:14,162 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-07-09 17:26:14,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-07-09 17:26:14,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:14,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:14,163 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:14,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-09 17:26:14,379 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:14,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1344046537, now seen corresponding path program 35 times [2021-07-09 17:26:14,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:14,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616989125] [2021-07-09 17:26:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:14,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:14,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616989125] [2021-07-09 17:26:14,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616989125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:14,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983817383] [2021-07-09 17:26:14,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:14,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:14,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:14,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:14,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:14,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983817383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:14,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:14,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:14,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884614520] [2021-07-09 17:26:14,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:14,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:14,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:14,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:14,886 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:15,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:15,893 INFO L93 Difference]: Finished difference Result 163 states and 313 transitions. [2021-07-09 17:26:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:26:15,893 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:15,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:15,894 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:26:15,894 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:26:15,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1101.8ms TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:26:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:26:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 75. [2021-07-09 17:26:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-07-09 17:26:15,896 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 16 [2021-07-09 17:26:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:15,896 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-07-09 17:26:15,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-07-09 17:26:15,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:15,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:15,896 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:16,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:16,113 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:16,113 INFO L82 PathProgramCache]: Analyzing trace with hash -806940605, now seen corresponding path program 36 times [2021-07-09 17:26:16,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:16,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838977285] [2021-07-09 17:26:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:16,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838977285] [2021-07-09 17:26:16,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838977285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:16,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031084252] [2021-07-09 17:26:16,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:16,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:26:16,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:16,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:16,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:16,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031084252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:16,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:16,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:26:16,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787929633] [2021-07-09 17:26:16,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:26:16,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:16,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:26:16,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:16,611 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:17,048 INFO L93 Difference]: Finished difference Result 116 states and 226 transitions. [2021-07-09 17:26:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:26:17,048 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:17,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:17,048 INFO L225 Difference]: With dead ends: 116 [2021-07-09 17:26:17,049 INFO L226 Difference]: Without dead ends: 103 [2021-07-09 17:26:17,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 665.3ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-09 17:26:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2021-07-09 17:26:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 159 transitions. [2021-07-09 17:26:17,050 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 159 transitions. Word has length 16 [2021-07-09 17:26:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:17,051 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 159 transitions. [2021-07-09 17:26:17,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 159 transitions. [2021-07-09 17:26:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:17,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:17,051 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:17,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-09 17:26:17,253 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:17,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1910684961, now seen corresponding path program 37 times [2021-07-09 17:26:17,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:17,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304669038] [2021-07-09 17:26:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:17,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:17,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304669038] [2021-07-09 17:26:17,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304669038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:17,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182912397] [2021-07-09 17:26:17,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:17,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:17,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:17,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182912397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:17,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:17,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:17,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769825575] [2021-07-09 17:26:17,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:17,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:17,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:17,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:17,739 INFO L87 Difference]: Start difference. First operand 77 states and 159 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:18,363 INFO L93 Difference]: Finished difference Result 128 states and 249 transitions. [2021-07-09 17:26:18,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:18,364 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:18,364 INFO L225 Difference]: With dead ends: 128 [2021-07-09 17:26:18,364 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 17:26:18,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 750.9ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:18,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 17:26:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 78. [2021-07-09 17:26:18,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-07-09 17:26:18,366 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-07-09 17:26:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:18,366 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-07-09 17:26:18,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,367 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-07-09 17:26:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:18,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:18,367 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:18,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-07-09 17:26:18,577 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1049691005, now seen corresponding path program 38 times [2021-07-09 17:26:18,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:18,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804908816] [2021-07-09 17:26:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:18,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:18,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804908816] [2021-07-09 17:26:18,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804908816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:18,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801188469] [2021-07-09 17:26:18,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:18,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:18,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:18,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:18,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:19,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801188469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:19,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:19,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:19,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800338043] [2021-07-09 17:26:19,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:19,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:19,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:19,101 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:19,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:19,625 INFO L93 Difference]: Finished difference Result 141 states and 268 transitions. [2021-07-09 17:26:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:19,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:19,626 INFO L225 Difference]: With dead ends: 141 [2021-07-09 17:26:19,626 INFO L226 Difference]: Without dead ends: 111 [2021-07-09 17:26:19,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 752.5ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-09 17:26:19,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 79. [2021-07-09 17:26:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 163 transitions. [2021-07-09 17:26:19,628 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 163 transitions. Word has length 16 [2021-07-09 17:26:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:19,628 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 163 transitions. [2021-07-09 17:26:19,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 163 transitions. [2021-07-09 17:26:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:19,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:19,629 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:19,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:19,845 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:19,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:19,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1877936069, now seen corresponding path program 39 times [2021-07-09 17:26:19,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:19,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514819054] [2021-07-09 17:26:19,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:20,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:20,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514819054] [2021-07-09 17:26:20,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514819054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:20,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004734951] [2021-07-09 17:26:20,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:20,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:26:20,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:20,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:20,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:20,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004734951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:20,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:20,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:20,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061289048] [2021-07-09 17:26:20,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:20,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:20,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:20,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:20,403 INFO L87 Difference]: Start difference. First operand 79 states and 163 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:21,001 INFO L93 Difference]: Finished difference Result 145 states and 279 transitions. [2021-07-09 17:26:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:26:21,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:21,002 INFO L225 Difference]: With dead ends: 145 [2021-07-09 17:26:21,002 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:26:21,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 841.4ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:21,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:26:21,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2021-07-09 17:26:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1204819277108435) internal successors, (176), 83 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 176 transitions. [2021-07-09 17:26:21,004 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 176 transitions. Word has length 16 [2021-07-09 17:26:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:21,004 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 176 transitions. [2021-07-09 17:26:21,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 176 transitions. [2021-07-09 17:26:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:21,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:21,005 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:21,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-09 17:26:21,221 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:21,222 INFO L82 PathProgramCache]: Analyzing trace with hash -543344739, now seen corresponding path program 40 times [2021-07-09 17:26:21,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:21,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346863873] [2021-07-09 17:26:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:21,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:21,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346863873] [2021-07-09 17:26:21,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346863873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:21,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4778882] [2021-07-09 17:26:21,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:21,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:21,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:21,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:21,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:21,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4778882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:21,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:21,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:21,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912189945] [2021-07-09 17:26:21,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:21,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:21,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:21,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:21,694 INFO L87 Difference]: Start difference. First operand 84 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:22,467 INFO L93 Difference]: Finished difference Result 173 states and 327 transitions. [2021-07-09 17:26:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:26:22,467 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:22,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:22,468 INFO L225 Difference]: With dead ends: 173 [2021-07-09 17:26:22,468 INFO L226 Difference]: Without dead ends: 154 [2021-07-09 17:26:22,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 894.9ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:26:22,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-09 17:26:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 84. [2021-07-09 17:26:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 83 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 177 transitions. [2021-07-09 17:26:22,470 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 177 transitions. Word has length 16 [2021-07-09 17:26:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:22,470 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 177 transitions. [2021-07-09 17:26:22,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 177 transitions. [2021-07-09 17:26:22,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:22,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:22,470 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:22,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:22,688 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1081200317, now seen corresponding path program 41 times [2021-07-09 17:26:22,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:22,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043439928] [2021-07-09 17:26:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:22,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:22,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043439928] [2021-07-09 17:26:22,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043439928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:22,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331199038] [2021-07-09 17:26:22,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:22,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:26:22,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:22,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:22,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:23,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331199038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:23,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:23,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:23,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514381833] [2021-07-09 17:26:23,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:23,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:23,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:23,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:23,173 INFO L87 Difference]: Start difference. First operand 84 states and 177 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:23,785 INFO L93 Difference]: Finished difference Result 179 states and 342 transitions. [2021-07-09 17:26:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:26:23,785 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:23,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:23,785 INFO L225 Difference]: With dead ends: 179 [2021-07-09 17:26:23,786 INFO L226 Difference]: Without dead ends: 160 [2021-07-09 17:26:23,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 759.1ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:26:23,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-09 17:26:23,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 86. [2021-07-09 17:26:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-07-09 17:26:23,788 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-07-09 17:26:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:23,788 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-07-09 17:26:23,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-07-09 17:26:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:23,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:23,788 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:23,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-09 17:26:23,989 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1305488025, now seen corresponding path program 42 times [2021-07-09 17:26:23,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:23,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431946385] [2021-07-09 17:26:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:24,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:24,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431946385] [2021-07-09 17:26:24,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431946385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:24,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138364109] [2021-07-09 17:26:24,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:24,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:26:24,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:24,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:24,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:24,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138364109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:24,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:24,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:26:24,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772846122] [2021-07-09 17:26:24,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:26:24,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:24,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:26:24,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:24,482 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:24,837 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2021-07-09 17:26:24,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:26:24,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:24,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:24,838 INFO L225 Difference]: With dead ends: 107 [2021-07-09 17:26:24,838 INFO L226 Difference]: Without dead ends: 94 [2021-07-09 17:26:24,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 627.8ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-09 17:26:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2021-07-09 17:26:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.13953488372093) internal successors, (184), 86 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 184 transitions. [2021-07-09 17:26:24,840 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 184 transitions. Word has length 16 [2021-07-09 17:26:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:24,840 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 184 transitions. [2021-07-09 17:26:24,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 184 transitions. [2021-07-09 17:26:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:24,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:24,840 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:25,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:25,047 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:25,048 INFO L82 PathProgramCache]: Analyzing trace with hash -271853705, now seen corresponding path program 43 times [2021-07-09 17:26:25,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:25,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18456256] [2021-07-09 17:26:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:25,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:25,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18456256] [2021-07-09 17:26:25,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18456256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:25,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74703713] [2021-07-09 17:26:25,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:25,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:25,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:25,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74703713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:25,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:25,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:25,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809341695] [2021-07-09 17:26:25,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:25,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:25,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:25,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:25,527 INFO L87 Difference]: Start difference. First operand 87 states and 184 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:26,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:26,113 INFO L93 Difference]: Finished difference Result 119 states and 238 transitions. [2021-07-09 17:26:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:26,113 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:26,114 INFO L225 Difference]: With dead ends: 119 [2021-07-09 17:26:26,114 INFO L226 Difference]: Without dead ends: 112 [2021-07-09 17:26:26,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 780.0ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:26,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-09 17:26:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 88. [2021-07-09 17:26:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2021-07-09 17:26:26,116 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 16 [2021-07-09 17:26:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:26,116 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2021-07-09 17:26:26,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2021-07-09 17:26:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:26,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:26,116 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:26,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:26,333 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:26,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1062737625, now seen corresponding path program 44 times [2021-07-09 17:26:26,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:26,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739883381] [2021-07-09 17:26:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:26,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:26,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739883381] [2021-07-09 17:26:26,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739883381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:26,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120433304] [2021-07-09 17:26:26,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:26,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:26,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:26,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:26,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120433304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:26,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:26,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:26,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835789522] [2021-07-09 17:26:26,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:26,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:26,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:26,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:26,818 INFO L87 Difference]: Start difference. First operand 88 states and 187 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:27,306 INFO L93 Difference]: Finished difference Result 144 states and 276 transitions. [2021-07-09 17:26:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:27,306 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:27,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:27,306 INFO L225 Difference]: With dead ends: 144 [2021-07-09 17:26:27,307 INFO L226 Difference]: Without dead ends: 118 [2021-07-09 17:26:27,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-09 17:26:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2021-07-09 17:26:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2021-07-09 17:26:27,309 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 16 [2021-07-09 17:26:27,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:27,309 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2021-07-09 17:26:27,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2021-07-09 17:26:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:27,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:27,309 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:27,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:27,529 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:27,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:27,529 INFO L82 PathProgramCache]: Analyzing trace with hash 234492561, now seen corresponding path program 45 times [2021-07-09 17:26:27,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:27,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505971013] [2021-07-09 17:26:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:27,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:27,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505971013] [2021-07-09 17:26:27,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505971013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:27,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949841947] [2021-07-09 17:26:27,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:27,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:26:27,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:27,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:27,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:28,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949841947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:28,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:28,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:28,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104202419] [2021-07-09 17:26:28,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:28,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:28,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:28,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:28,033 INFO L87 Difference]: Start difference. First operand 88 states and 187 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:28,701 INFO L93 Difference]: Finished difference Result 141 states and 272 transitions. [2021-07-09 17:26:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:26:28,701 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:28,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:28,702 INFO L225 Difference]: With dead ends: 141 [2021-07-09 17:26:28,702 INFO L226 Difference]: Without dead ends: 116 [2021-07-09 17:26:28,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 918.7ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:26:28,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-09 17:26:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 91. [2021-07-09 17:26:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1666666666666665) internal successors, (195), 90 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 195 transitions. [2021-07-09 17:26:28,704 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 195 transitions. Word has length 16 [2021-07-09 17:26:28,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:28,704 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 195 transitions. [2021-07-09 17:26:28,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 195 transitions. [2021-07-09 17:26:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:28,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:28,704 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:28,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:28,917 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:28,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:28,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1031228313, now seen corresponding path program 46 times [2021-07-09 17:26:28,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:28,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957598706] [2021-07-09 17:26:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:29,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:29,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957598706] [2021-07-09 17:26:29,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957598706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:29,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321955826] [2021-07-09 17:26:29,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:29,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:29,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:29,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:29,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:29,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321955826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:29,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:29,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:29,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926210499] [2021-07-09 17:26:29,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:29,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:29,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:29,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:29,337 INFO L87 Difference]: Start difference. First operand 91 states and 195 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:29,735 INFO L93 Difference]: Finished difference Result 150 states and 295 transitions. [2021-07-09 17:26:29,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:29,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:29,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:29,737 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:26:29,737 INFO L226 Difference]: Without dead ends: 124 [2021-07-09 17:26:29,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 565.5ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-07-09 17:26:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2021-07-09 17:26:29,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-07-09 17:26:29,739 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 16 [2021-07-09 17:26:29,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:29,739 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-07-09 17:26:29,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-07-09 17:26:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:29,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:29,739 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:29,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-07-09 17:26:29,953 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:29,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:29,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1248642377, now seen corresponding path program 47 times [2021-07-09 17:26:29,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:29,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95731207] [2021-07-09 17:26:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:30,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:30,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95731207] [2021-07-09 17:26:30,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95731207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:30,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848249643] [2021-07-09 17:26:30,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:30,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:26:30,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:30,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:30,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848249643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:30,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:30,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:30,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627893129] [2021-07-09 17:26:30,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:30,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:30,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:30,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:30,474 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:30,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:30,998 INFO L93 Difference]: Finished difference Result 176 states and 339 transitions. [2021-07-09 17:26:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:30,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:30,999 INFO L225 Difference]: With dead ends: 176 [2021-07-09 17:26:30,999 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 17:26:30,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 781.8ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 17:26:31,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2021-07-09 17:26:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-07-09 17:26:31,002 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 16 [2021-07-09 17:26:31,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:31,002 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-07-09 17:26:31,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,002 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-07-09 17:26:31,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:31,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:31,002 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:31,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:31,219 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:31,219 INFO L82 PathProgramCache]: Analyzing trace with hash -565135694, now seen corresponding path program 48 times [2021-07-09 17:26:31,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:31,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885583326] [2021-07-09 17:26:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:31,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:31,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885583326] [2021-07-09 17:26:31,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885583326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:31,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867949996] [2021-07-09 17:26:31,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:31,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:26:31,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:31,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:31,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:31,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867949996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:31,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:31,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:31,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611617443] [2021-07-09 17:26:31,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:31,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:31,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:31,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:31,403 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:31,437 INFO L93 Difference]: Finished difference Result 99 states and 210 transitions. [2021-07-09 17:26:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:26:31,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:31,437 INFO L225 Difference]: With dead ends: 99 [2021-07-09 17:26:31,437 INFO L226 Difference]: Without dead ends: 99 [2021-07-09 17:26:31,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:31,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-09 17:26:31,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2021-07-09 17:26:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.176470588235294) internal successors, (185), 85 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 185 transitions. [2021-07-09 17:26:31,439 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 185 transitions. Word has length 16 [2021-07-09 17:26:31,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:31,439 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 185 transitions. [2021-07-09 17:26:31,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 185 transitions. [2021-07-09 17:26:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:31,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:31,439 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:31,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:31,640 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:31,640 INFO L82 PathProgramCache]: Analyzing trace with hash 85948953, now seen corresponding path program 49 times [2021-07-09 17:26:31,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:31,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696064825] [2021-07-09 17:26:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:31,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:31,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696064825] [2021-07-09 17:26:31,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696064825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:31,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751456425] [2021-07-09 17:26:31,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:31,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:31,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:32,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751456425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:32,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:32,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:32,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929258982] [2021-07-09 17:26:32,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:32,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:32,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:32,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:32,089 INFO L87 Difference]: Start difference. First operand 86 states and 185 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:32,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:32,620 INFO L93 Difference]: Finished difference Result 159 states and 305 transitions. [2021-07-09 17:26:32,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:26:32,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:32,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:32,621 INFO L225 Difference]: With dead ends: 159 [2021-07-09 17:26:32,621 INFO L226 Difference]: Without dead ends: 140 [2021-07-09 17:26:32,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 692.5ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-07-09 17:26:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 89. [2021-07-09 17:26:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.215909090909091) internal successors, (195), 88 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:32,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 195 transitions. [2021-07-09 17:26:32,623 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 195 transitions. Word has length 16 [2021-07-09 17:26:32,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:32,623 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 195 transitions. [2021-07-09 17:26:32,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 195 transitions. [2021-07-09 17:26:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:32,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:32,624 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:32,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:32,837 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:32,837 INFO L82 PathProgramCache]: Analyzing trace with hash -451906625, now seen corresponding path program 50 times [2021-07-09 17:26:32,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:32,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338623188] [2021-07-09 17:26:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:32,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:32,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338623188] [2021-07-09 17:26:32,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338623188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:32,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95387528] [2021-07-09 17:26:32,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:32,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:32,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:32,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:32,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:33,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95387528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:33,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:33,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:33,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122542905] [2021-07-09 17:26:33,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:33,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:33,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:33,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:33,259 INFO L87 Difference]: Start difference. First operand 89 states and 195 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:33,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:33,947 INFO L93 Difference]: Finished difference Result 146 states and 293 transitions. [2021-07-09 17:26:33,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:33,947 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:33,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:33,947 INFO L225 Difference]: With dead ends: 146 [2021-07-09 17:26:33,948 INFO L226 Difference]: Without dead ends: 106 [2021-07-09 17:26:33,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 835.3ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-09 17:26:33,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2021-07-09 17:26:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.215909090909091) internal successors, (195), 88 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 195 transitions. [2021-07-09 17:26:33,949 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 195 transitions. Word has length 16 [2021-07-09 17:26:33,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:33,949 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 195 transitions. [2021-07-09 17:26:33,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 195 transitions. [2021-07-09 17:26:33,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:33,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:33,950 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:34,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:34,165 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:34,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:34,165 INFO L82 PathProgramCache]: Analyzing trace with hash 54439641, now seen corresponding path program 51 times [2021-07-09 17:26:34,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:34,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157959198] [2021-07-09 17:26:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:34,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:34,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157959198] [2021-07-09 17:26:34,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157959198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:34,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947298204] [2021-07-09 17:26:34,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:34,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:26:34,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:34,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:34,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:34,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947298204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:34,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:34,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:34,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277794997] [2021-07-09 17:26:34,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:34,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:34,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:34,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:34,579 INFO L87 Difference]: Start difference. First operand 89 states and 195 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:35,324 INFO L93 Difference]: Finished difference Result 184 states and 344 transitions. [2021-07-09 17:26:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:35,325 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:35,325 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:26:35,325 INFO L226 Difference]: Without dead ends: 149 [2021-07-09 17:26:35,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 864.1ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:26:35,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-09 17:26:35,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 91. [2021-07-09 17:26:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 90 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-07-09 17:26:35,327 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 16 [2021-07-09 17:26:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:35,327 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-07-09 17:26:35,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-07-09 17:26:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:35,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:35,328 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:35,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-07-09 17:26:35,537 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:35,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2140856799, now seen corresponding path program 52 times [2021-07-09 17:26:35,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:35,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861209008] [2021-07-09 17:26:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:35,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:35,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861209008] [2021-07-09 17:26:35,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861209008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:35,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796783397] [2021-07-09 17:26:35,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:35,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:35,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:35,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:35,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:36,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796783397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:36,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:36,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:26:36,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702308208] [2021-07-09 17:26:36,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:26:36,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:36,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:26:36,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:36,032 INFO L87 Difference]: Start difference. First operand 91 states and 199 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:36,377 INFO L93 Difference]: Finished difference Result 107 states and 224 transitions. [2021-07-09 17:26:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:36,378 INFO L225 Difference]: With dead ends: 107 [2021-07-09 17:26:36,378 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 17:26:36,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 609.3ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:36,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 17:26:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2021-07-09 17:26:36,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-07-09 17:26:36,380 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 16 [2021-07-09 17:26:36,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:36,380 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-07-09 17:26:36,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-07-09 17:26:36,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:36,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:36,380 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:36,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-07-09 17:26:36,590 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:36,590 INFO L82 PathProgramCache]: Analyzing trace with hash 576768767, now seen corresponding path program 53 times [2021-07-09 17:26:36,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:36,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727093924] [2021-07-09 17:26:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:36,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:36,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727093924] [2021-07-09 17:26:36,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727093924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:36,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241317943] [2021-07-09 17:26:36,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:36,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:36,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:36,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:37,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241317943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:37,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:37,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:37,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340825602] [2021-07-09 17:26:37,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:37,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:37,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:37,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:37,008 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:37,599 INFO L93 Difference]: Finished difference Result 138 states and 276 transitions. [2021-07-09 17:26:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:37,599 INFO L225 Difference]: With dead ends: 138 [2021-07-09 17:26:37,600 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:26:37,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 732.4ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:26:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 95. [2021-07-09 17:26:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.2127659574468086) internal successors, (208), 94 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 208 transitions. [2021-07-09 17:26:37,601 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 208 transitions. Word has length 16 [2021-07-09 17:26:37,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:37,601 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 208 transitions. [2021-07-09 17:26:37,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 208 transitions. [2021-07-09 17:26:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:37,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:37,602 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:37,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-07-09 17:26:37,821 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1911360097, now seen corresponding path program 54 times [2021-07-09 17:26:37,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:37,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245519094] [2021-07-09 17:26:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:37,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:37,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245519094] [2021-07-09 17:26:37,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245519094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:37,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849922581] [2021-07-09 17:26:37,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:37,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:26:37,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:37,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:37,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:38,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849922581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:38,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:38,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:38,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121466405] [2021-07-09 17:26:38,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:38,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:38,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:38,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:38,252 INFO L87 Difference]: Start difference. First operand 95 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:38,709 INFO L93 Difference]: Finished difference Result 146 states and 288 transitions. [2021-07-09 17:26:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:38,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:38,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:38,709 INFO L225 Difference]: With dead ends: 146 [2021-07-09 17:26:38,710 INFO L226 Difference]: Without dead ends: 120 [2021-07-09 17:26:38,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 614.0ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-09 17:26:38,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2021-07-09 17:26:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-07-09 17:26:38,711 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 16 [2021-07-09 17:26:38,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:38,711 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-07-09 17:26:38,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:38,712 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-07-09 17:26:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:38,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:38,712 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:38,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-07-09 17:26:38,912 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:38,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:38,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1290310270, now seen corresponding path program 55 times [2021-07-09 17:26:38,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:38,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801416781] [2021-07-09 17:26:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:38,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:38,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801416781] [2021-07-09 17:26:38,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801416781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:38,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419631100] [2021-07-09 17:26:38,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:38,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:38,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:39,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419631100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:39,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:39,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:39,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047006127] [2021-07-09 17:26:39,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:39,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:39,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:39,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:39,042 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:39,115 INFO L93 Difference]: Finished difference Result 112 states and 241 transitions. [2021-07-09 17:26:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:26:39,115 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:39,115 INFO L225 Difference]: With dead ends: 112 [2021-07-09 17:26:39,115 INFO L226 Difference]: Without dead ends: 112 [2021-07-09 17:26:39,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-09 17:26:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2021-07-09 17:26:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 92 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-07-09 17:26:39,117 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 16 [2021-07-09 17:26:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:39,117 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-07-09 17:26:39,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-07-09 17:26:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:39,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:39,118 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:39,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:39,333 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:39,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:39,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1083115033, now seen corresponding path program 56 times [2021-07-09 17:26:39,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:39,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468034709] [2021-07-09 17:26:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:39,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:39,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468034709] [2021-07-09 17:26:39,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468034709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:39,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939783496] [2021-07-09 17:26:39,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:39,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:39,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:39,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:39,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:39,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939783496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:39,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:39,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:39,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389374443] [2021-07-09 17:26:39,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:39,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:39,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:39,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:39,795 INFO L87 Difference]: Start difference. First operand 93 states and 203 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:40,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:40,339 INFO L93 Difference]: Finished difference Result 152 states and 301 transitions. [2021-07-09 17:26:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:40,340 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:40,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:40,340 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:26:40,340 INFO L226 Difference]: Without dead ends: 132 [2021-07-09 17:26:40,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 738.5ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:40,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-09 17:26:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2021-07-09 17:26:40,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2061855670103094) internal successors, (214), 97 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 214 transitions. [2021-07-09 17:26:40,343 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 214 transitions. Word has length 16 [2021-07-09 17:26:40,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:40,343 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 214 transitions. [2021-07-09 17:26:40,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:40,343 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 214 transitions. [2021-07-09 17:26:40,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:40,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:40,343 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:40,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:40,553 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:40,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1877260933, now seen corresponding path program 57 times [2021-07-09 17:26:40,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:40,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267055991] [2021-07-09 17:26:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:40,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:40,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267055991] [2021-07-09 17:26:40,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267055991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:40,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562326693] [2021-07-09 17:26:40,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:40,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:26:40,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:40,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:40,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:41,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562326693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:41,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:41,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:41,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304357012] [2021-07-09 17:26:41,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:41,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:41,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:41,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:41,002 INFO L87 Difference]: Start difference. First operand 98 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:41,404 INFO L93 Difference]: Finished difference Result 148 states and 293 transitions. [2021-07-09 17:26:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:41,404 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:41,405 INFO L225 Difference]: With dead ends: 148 [2021-07-09 17:26:41,405 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:26:41,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 594.6ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:41,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:26:41,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-07-09 17:26:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-07-09 17:26:41,407 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 16 [2021-07-09 17:26:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:41,407 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-07-09 17:26:41,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-07-09 17:26:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:41,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:41,407 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:41,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:41,608 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:41,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1879850785, now seen corresponding path program 58 times [2021-07-09 17:26:41,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:41,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792950968] [2021-07-09 17:26:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:41,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:41,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792950968] [2021-07-09 17:26:41,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792950968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:41,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656829465] [2021-07-09 17:26:41,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:41,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:41,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:41,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:41,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:42,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656829465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:42,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:42,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:42,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568874646] [2021-07-09 17:26:42,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:42,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:42,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:42,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:42,024 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:42,607 INFO L93 Difference]: Finished difference Result 171 states and 342 transitions. [2021-07-09 17:26:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:42,608 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:42,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:42,608 INFO L225 Difference]: With dead ends: 171 [2021-07-09 17:26:42,608 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:26:42,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 728.1ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:26:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:26:42,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 100. [2021-07-09 17:26:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2323232323232323) internal successors, (221), 99 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2021-07-09 17:26:42,610 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 16 [2021-07-09 17:26:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:42,610 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2021-07-09 17:26:42,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2021-07-09 17:26:42,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:42,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:42,611 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:42,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-07-09 17:26:42,817 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash -400019905, now seen corresponding path program 59 times [2021-07-09 17:26:42,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:42,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745736710] [2021-07-09 17:26:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:42,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:42,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745736710] [2021-07-09 17:26:42,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745736710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:42,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422686336] [2021-07-09 17:26:42,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:43,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:26:43,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:43,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:43,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:43,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422686336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:43,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:43,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:43,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218004223] [2021-07-09 17:26:43,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:43,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:43,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:43,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:43,266 INFO L87 Difference]: Start difference. First operand 100 states and 221 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:43,598 INFO L93 Difference]: Finished difference Result 131 states and 273 transitions. [2021-07-09 17:26:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:43,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:43,599 INFO L225 Difference]: With dead ends: 131 [2021-07-09 17:26:43,599 INFO L226 Difference]: Without dead ends: 120 [2021-07-09 17:26:43,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 553.4ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:43,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-09 17:26:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-07-09 17:26:43,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.227722772277228) internal successors, (225), 101 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 225 transitions. [2021-07-09 17:26:43,601 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 225 transitions. Word has length 16 [2021-07-09 17:26:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:43,601 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 225 transitions. [2021-07-09 17:26:43,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 225 transitions. [2021-07-09 17:26:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:43,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:43,601 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:43,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:43,813 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash 934571425, now seen corresponding path program 60 times [2021-07-09 17:26:43,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:43,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6570761] [2021-07-09 17:26:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:43,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:43,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6570761] [2021-07-09 17:26:43,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6570761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:43,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941371250] [2021-07-09 17:26:43,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:43,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:26:43,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:43,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:43,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:44,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941371250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:44,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:44,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:44,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969940858] [2021-07-09 17:26:44,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:44,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:44,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:44,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:44,173 INFO L87 Difference]: Start difference. First operand 102 states and 225 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:44,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:44,831 INFO L93 Difference]: Finished difference Result 178 states and 347 transitions. [2021-07-09 17:26:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:44,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:44,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:44,832 INFO L225 Difference]: With dead ends: 178 [2021-07-09 17:26:44,832 INFO L226 Difference]: Without dead ends: 159 [2021-07-09 17:26:44,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 728.1ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-09 17:26:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2021-07-09 17:26:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2427184466019416) internal successors, (231), 103 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 231 transitions. [2021-07-09 17:26:44,834 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 231 transitions. Word has length 16 [2021-07-09 17:26:44,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:44,834 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 231 transitions. [2021-07-09 17:26:44,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:44,834 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 231 transitions. [2021-07-09 17:26:44,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:44,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:44,834 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:45,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-07-09 17:26:45,051 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:45,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:45,051 INFO L82 PathProgramCache]: Analyzing trace with hash 396715847, now seen corresponding path program 61 times [2021-07-09 17:26:45,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:45,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203040434] [2021-07-09 17:26:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:45,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:45,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203040434] [2021-07-09 17:26:45,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203040434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:45,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430335158] [2021-07-09 17:26:45,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:45,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:45,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:45,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430335158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:45,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:45,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:45,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519766314] [2021-07-09 17:26:45,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:45,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:45,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:45,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:45,473 INFO L87 Difference]: Start difference. First operand 104 states and 231 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:45,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:45,999 INFO L93 Difference]: Finished difference Result 161 states and 329 transitions. [2021-07-09 17:26:45,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:26:45,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:45,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:46,000 INFO L225 Difference]: With dead ends: 161 [2021-07-09 17:26:46,000 INFO L226 Difference]: Without dead ends: 132 [2021-07-09 17:26:46,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 706.3ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:26:46,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-09 17:26:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-07-09 17:26:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.2641509433962264) internal successors, (240), 106 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 240 transitions. [2021-07-09 17:26:46,006 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 240 transitions. Word has length 16 [2021-07-09 17:26:46,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:46,006 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 240 transitions. [2021-07-09 17:26:46,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 240 transitions. [2021-07-09 17:26:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:46,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:46,007 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:46,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:46,207 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:46,208 INFO L82 PathProgramCache]: Analyzing trace with hash 189520610, now seen corresponding path program 62 times [2021-07-09 17:26:46,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:46,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955907423] [2021-07-09 17:26:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:46,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:46,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955907423] [2021-07-09 17:26:46,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955907423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:46,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019990504] [2021-07-09 17:26:46,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:46,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:46,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:46,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:46,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:46,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019990504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:46,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:46,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:46,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889027802] [2021-07-09 17:26:46,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:46,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:46,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:46,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:46,387 INFO L87 Difference]: Start difference. First operand 107 states and 240 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:46,519 INFO L93 Difference]: Finished difference Result 163 states and 332 transitions. [2021-07-09 17:26:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:26:46,519 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:46,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:46,520 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:26:46,520 INFO L226 Difference]: Without dead ends: 163 [2021-07-09 17:26:46,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:46,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-09 17:26:46,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2021-07-09 17:26:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.293577981651376) internal successors, (250), 109 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 250 transitions. [2021-07-09 17:26:46,522 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 250 transitions. Word has length 16 [2021-07-09 17:26:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:46,522 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 250 transitions. [2021-07-09 17:26:46,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 250 transitions. [2021-07-09 17:26:46,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:46,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:46,523 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:46,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-07-09 17:26:46,739 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:46,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:46,740 INFO L82 PathProgramCache]: Analyzing trace with hash 903062113, now seen corresponding path program 63 times [2021-07-09 17:26:46,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:46,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096496205] [2021-07-09 17:26:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:46,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:46,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096496205] [2021-07-09 17:26:46,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096496205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:46,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111784993] [2021-07-09 17:26:46,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:46,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:26:46,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:46,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:46,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:47,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111784993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:47,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:47,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:47,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678304988] [2021-07-09 17:26:47,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:47,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:47,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:47,152 INFO L87 Difference]: Start difference. First operand 110 states and 250 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:48,538 INFO L93 Difference]: Finished difference Result 219 states and 429 transitions. [2021-07-09 17:26:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:26:48,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:48,539 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:26:48,539 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:26:48,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1516.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:26:48,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:26:48,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2021-07-09 17:26:48,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.280701754385965) internal successors, (260), 114 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 260 transitions. [2021-07-09 17:26:48,542 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 260 transitions. Word has length 16 [2021-07-09 17:26:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:48,542 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 260 transitions. [2021-07-09 17:26:48,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 260 transitions. [2021-07-09 17:26:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:48,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:48,542 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:48,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-09 17:26:48,757 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:48,757 INFO L82 PathProgramCache]: Analyzing trace with hash 695866876, now seen corresponding path program 64 times [2021-07-09 17:26:48,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:48,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005190090] [2021-07-09 17:26:48,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:48,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:48,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005190090] [2021-07-09 17:26:48,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005190090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:48,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379933107] [2021-07-09 17:26:48,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:48,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:48,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:48,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:26:48,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:48,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379933107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:48,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:48,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:26:48,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830191344] [2021-07-09 17:26:48,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:26:48,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:48,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:26:48,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:48,876 INFO L87 Difference]: Start difference. First operand 115 states and 260 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:48,920 INFO L93 Difference]: Finished difference Result 127 states and 279 transitions. [2021-07-09 17:26:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:26:48,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:48,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:48,921 INFO L225 Difference]: With dead ends: 127 [2021-07-09 17:26:48,921 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:26:48,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:26:48,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:26:48,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2021-07-09 17:26:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.25) internal successors, (252), 112 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 252 transitions. [2021-07-09 17:26:48,923 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 252 transitions. Word has length 16 [2021-07-09 17:26:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:48,923 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 252 transitions. [2021-07-09 17:26:48,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 252 transitions. [2021-07-09 17:26:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:48,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:48,923 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:49,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-09 17:26:49,137 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:49,137 INFO L82 PathProgramCache]: Analyzing trace with hash 444951547, now seen corresponding path program 65 times [2021-07-09 17:26:49,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:49,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229972010] [2021-07-09 17:26:49,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:49,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:49,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229972010] [2021-07-09 17:26:49,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229972010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:49,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342683584] [2021-07-09 17:26:49,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:49,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:26:49,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:49,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:49,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:49,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342683584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:49,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:49,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:49,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254238470] [2021-07-09 17:26:49,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:49,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:49,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:49,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:49,672 INFO L87 Difference]: Start difference. First operand 113 states and 252 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:49,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:49,968 INFO L93 Difference]: Finished difference Result 149 states and 313 transitions. [2021-07-09 17:26:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:49,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:49,969 INFO L225 Difference]: With dead ends: 149 [2021-07-09 17:26:49,969 INFO L226 Difference]: Without dead ends: 138 [2021-07-09 17:26:49,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:49,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-09 17:26:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 115. [2021-07-09 17:26:49,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.245614035087719) internal successors, (256), 114 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 256 transitions. [2021-07-09 17:26:49,972 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 256 transitions. Word has length 16 [2021-07-09 17:26:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:49,972 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 256 transitions. [2021-07-09 17:26:49,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 256 transitions. [2021-07-09 17:26:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:49,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:49,972 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:50,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-09 17:26:50,196 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:50,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1779542877, now seen corresponding path program 66 times [2021-07-09 17:26:50,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:50,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666070835] [2021-07-09 17:26:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:50,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:50,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666070835] [2021-07-09 17:26:50,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666070835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:50,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594939665] [2021-07-09 17:26:50,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:50,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:26:50,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:50,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:50,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:50,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594939665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:50,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:50,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:50,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604340431] [2021-07-09 17:26:50,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:50,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:50,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:50,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:50,680 INFO L87 Difference]: Start difference. First operand 115 states and 256 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:51,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:51,047 INFO L93 Difference]: Finished difference Result 160 states and 331 transitions. [2021-07-09 17:26:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:51,047 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:51,048 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:26:51,048 INFO L226 Difference]: Without dead ends: 141 [2021-07-09 17:26:51,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 587.4ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-09 17:26:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2021-07-09 17:26:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.247787610619469) internal successors, (254), 113 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-07-09 17:26:51,057 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-07-09 17:26:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:51,057 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-07-09 17:26:51,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-07-09 17:26:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:51,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:51,057 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:51,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-07-09 17:26:51,258 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:51,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1241687299, now seen corresponding path program 67 times [2021-07-09 17:26:51,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:51,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335411010] [2021-07-09 17:26:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:51,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:51,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335411010] [2021-07-09 17:26:51,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335411010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:51,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941800796] [2021-07-09 17:26:51,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:51,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:51,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:51,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941800796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:51,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:51,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:51,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657138815] [2021-07-09 17:26:51,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:51,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:51,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:51,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:51,739 INFO L87 Difference]: Start difference. First operand 114 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:52,359 INFO L93 Difference]: Finished difference Result 167 states and 349 transitions. [2021-07-09 17:26:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:52,359 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:52,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:52,360 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:26:52,360 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:26:52,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 769.5ms TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:26:52,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:26:52,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 114. [2021-07-09 17:26:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.247787610619469) internal successors, (254), 113 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-07-09 17:26:52,363 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-07-09 17:26:52,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:52,363 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-07-09 17:26:52,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-07-09 17:26:52,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:52,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:52,363 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:52,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:52,564 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:52,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1748033565, now seen corresponding path program 68 times [2021-07-09 17:26:52,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:52,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40997405] [2021-07-09 17:26:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:52,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:52,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40997405] [2021-07-09 17:26:52,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40997405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:52,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385337257] [2021-07-09 17:26:52,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:52,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:52,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:52,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:26:52,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:53,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385337257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:53,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:53,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:53,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716844011] [2021-07-09 17:26:53,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:53,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:53,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:53,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:53,043 INFO L87 Difference]: Start difference. First operand 114 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:53,571 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-09 17:26:53,740 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-07-09 17:26:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:53,819 INFO L93 Difference]: Finished difference Result 201 states and 395 transitions. [2021-07-09 17:26:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:53,820 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:53,820 INFO L225 Difference]: With dead ends: 201 [2021-07-09 17:26:53,820 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:26:53,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 909.6ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:53,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:26:53,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2021-07-09 17:26:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.247787610619469) internal successors, (254), 113 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:53,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-07-09 17:26:53,822 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-07-09 17:26:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:53,822 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-07-09 17:26:53,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:53,822 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-07-09 17:26:53,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:26:53,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:53,823 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:54,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:54,037 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:54,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:54,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2104034591, now seen corresponding path program 69 times [2021-07-09 17:26:54,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:54,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498136890] [2021-07-09 17:26:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:54,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:54,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498136890] [2021-07-09 17:26:54,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498136890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:54,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026415222] [2021-07-09 17:26:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:54,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:26:54,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:54,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:26:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:54,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026415222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:54,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:54,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:26:54,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547810699] [2021-07-09 17:26:54,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:26:54,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:54,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:26:54,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:54,513 INFO L87 Difference]: Start difference. First operand 114 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:54,968 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-07-09 17:26:55,264 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-07-09 17:26:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:55,289 INFO L93 Difference]: Finished difference Result 187 states and 386 transitions. [2021-07-09 17:26:55,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:55,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:26:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:55,290 INFO L225 Difference]: With dead ends: 187 [2021-07-09 17:26:55,290 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:26:55,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 969.1ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:26:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-07-09 17:26:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2413793103448274) internal successors, (260), 116 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 260 transitions. [2021-07-09 17:26:55,292 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 260 transitions. Word has length 16 [2021-07-09 17:26:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:55,292 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 260 transitions. [2021-07-09 17:26:55,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 260 transitions. [2021-07-09 17:26:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:55,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:55,292 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:55,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:55,493 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:55,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:55,493 INFO L82 PathProgramCache]: Analyzing trace with hash -570507776, now seen corresponding path program 70 times [2021-07-09 17:26:55,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:55,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069153421] [2021-07-09 17:26:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:55,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:55,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069153421] [2021-07-09 17:26:55,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069153421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:55,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910023146] [2021-07-09 17:26:55,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:55,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:55,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:55,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:55,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:55,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910023146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:55,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:55,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:26:55,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707136533] [2021-07-09 17:26:55,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:55,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:55,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:55,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:55,664 INFO L87 Difference]: Start difference. First operand 117 states and 260 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:55,753 INFO L93 Difference]: Finished difference Result 159 states and 338 transitions. [2021-07-09 17:26:55,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:26:55,753 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:55,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:55,754 INFO L225 Difference]: With dead ends: 159 [2021-07-09 17:26:55,754 INFO L226 Difference]: Without dead ends: 159 [2021-07-09 17:26:55,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:55,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-09 17:26:55,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2021-07-09 17:26:55,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-07-09 17:26:55,756 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-07-09 17:26:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:55,756 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-07-09 17:26:55,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-07-09 17:26:55,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:55,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:55,756 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:55,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-07-09 17:26:55,957 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:55,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1010264140, now seen corresponding path program 71 times [2021-07-09 17:26:55,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:55,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221690864] [2021-07-09 17:26:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:56,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:56,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221690864] [2021-07-09 17:26:56,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221690864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:56,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850521315] [2021-07-09 17:26:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:56,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:26:56,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:56,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:56,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:56,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850521315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:56,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:56,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:26:56,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616163909] [2021-07-09 17:26:56,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:56,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:56,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:56,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:56,163 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:56,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:56,479 INFO L93 Difference]: Finished difference Result 174 states and 368 transitions. [2021-07-09 17:26:56,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:56,479 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:56,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:56,480 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:26:56,480 INFO L226 Difference]: Without dead ends: 174 [2021-07-09 17:26:56,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:56,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-09 17:26:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 118. [2021-07-09 17:26:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-07-09 17:26:56,482 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-07-09 17:26:56,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:56,482 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-07-09 17:26:56,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:56,482 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-07-09 17:26:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:56,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:56,482 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:56,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-09 17:26:56,697 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash -60731324, now seen corresponding path program 72 times [2021-07-09 17:26:56,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:56,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341468007] [2021-07-09 17:26:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:56,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:56,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341468007] [2021-07-09 17:26:56,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341468007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:56,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013142833] [2021-07-09 17:26:56,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:56,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:26:56,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:56,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:56,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:56,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013142833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:56,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:56,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:26:56,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52001951] [2021-07-09 17:26:56,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:56,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:56,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:56,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:56,936 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:57,105 INFO L93 Difference]: Finished difference Result 168 states and 356 transitions. [2021-07-09 17:26:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:57,106 INFO L225 Difference]: With dead ends: 168 [2021-07-09 17:26:57,106 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 17:26:57,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 17:26:57,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 118. [2021-07-09 17:26:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-07-09 17:26:57,108 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-07-09 17:26:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:57,108 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-07-09 17:26:57,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-07-09 17:26:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:57,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:57,108 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:57,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-07-09 17:26:57,309 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:57,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:57,309 INFO L82 PathProgramCache]: Analyzing trace with hash 736004428, now seen corresponding path program 73 times [2021-07-09 17:26:57,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:57,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939686246] [2021-07-09 17:26:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:57,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:57,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939686246] [2021-07-09 17:26:57,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939686246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:57,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775703001] [2021-07-09 17:26:57,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:57,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:57,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:57,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775703001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:57,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:57,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:26:57,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145068964] [2021-07-09 17:26:57,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:57,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:57,509 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:57,713 INFO L93 Difference]: Finished difference Result 170 states and 355 transitions. [2021-07-09 17:26:57,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:57,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:57,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:57,714 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:26:57,714 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:26:57,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:26:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 118. [2021-07-09 17:26:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-07-09 17:26:57,716 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-07-09 17:26:57,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:57,716 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-07-09 17:26:57,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:57,716 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-07-09 17:26:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:57,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:57,717 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:57,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:57,925 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:57,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:57,925 INFO L82 PathProgramCache]: Analyzing trace with hash 528809191, now seen corresponding path program 74 times [2021-07-09 17:26:57,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:57,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680801571] [2021-07-09 17:26:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:57,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:57,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680801571] [2021-07-09 17:26:57,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680801571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:57,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55435549] [2021-07-09 17:26:57,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:58,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:58,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:58,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:58,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:58,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55435549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:58,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:58,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:26:58,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691312957] [2021-07-09 17:26:58,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:58,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:58,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:58,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:58,209 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:58,401 INFO L93 Difference]: Finished difference Result 170 states and 351 transitions. [2021-07-09 17:26:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:26:58,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:58,402 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:26:58,402 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 17:26:58,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 327.6ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:58,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 17:26:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 122. [2021-07-09 17:26:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.2479338842975207) internal successors, (272), 121 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 272 transitions. [2021-07-09 17:26:58,404 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 272 transitions. Word has length 17 [2021-07-09 17:26:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:58,404 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 272 transitions. [2021-07-09 17:26:58,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 272 transitions. [2021-07-09 17:26:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:58,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:58,405 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:58,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-07-09 17:26:58,605 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:58,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1863400521, now seen corresponding path program 75 times [2021-07-09 17:26:58,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:58,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550776448] [2021-07-09 17:26:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:58,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:58,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550776448] [2021-07-09 17:26:58,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550776448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:58,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736424546] [2021-07-09 17:26:58,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:58,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:26:58,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:58,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:58,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:58,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736424546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:58,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:58,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:26:58,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015888247] [2021-07-09 17:26:58,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:58,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:58,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:58,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:58,880 INFO L87 Difference]: Start difference. First operand 122 states and 272 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:59,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:59,042 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2021-07-09 17:26:59,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:59,043 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:59,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:59,043 INFO L225 Difference]: With dead ends: 157 [2021-07-09 17:26:59,043 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:26:59,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:59,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:26:59,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2021-07-09 17:26:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-07-09 17:26:59,045 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-07-09 17:26:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:59,045 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-07-09 17:26:59,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-07-09 17:26:59,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:59,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:59,046 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:59,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:59,261 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:59,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1172274526, now seen corresponding path program 76 times [2021-07-09 17:26:59,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:59,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276303768] [2021-07-09 17:26:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:59,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:59,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276303768] [2021-07-09 17:26:59,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276303768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:59,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540776118] [2021-07-09 17:26:59,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:59,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:59,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:59,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:26:59,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:59,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540776118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:59,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:59,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:26:59,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071709742] [2021-07-09 17:26:59,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:59,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:59,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:59,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:59,492 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:59,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:59,660 INFO L93 Difference]: Finished difference Result 138 states and 301 transitions. [2021-07-09 17:26:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:26:59,661 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:26:59,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:59,661 INFO L225 Difference]: With dead ends: 138 [2021-07-09 17:26:59,661 INFO L226 Difference]: Without dead ends: 138 [2021-07-09 17:26:59,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-09 17:26:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2021-07-09 17:26:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-07-09 17:26:59,672 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-07-09 17:26:59,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:59,672 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-07-09 17:26:59,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-07-09 17:26:59,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:26:59,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:59,672 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:59,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-07-09 17:26:59,881 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:59,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:59,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2051697306, now seen corresponding path program 77 times [2021-07-09 17:26:59,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:59,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885500015] [2021-07-09 17:26:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:59,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:59,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885500015] [2021-07-09 17:26:59,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885500015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:59,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423944071] [2021-07-09 17:26:59,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:00,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:27:00,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:00,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:00,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:00,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423944071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:00,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:00,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:00,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507628326] [2021-07-09 17:27:00,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:00,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:00,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:00,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:00,141 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:00,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:00,238 INFO L93 Difference]: Finished difference Result 148 states and 321 transitions. [2021-07-09 17:27:00,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:00,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:00,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:00,239 INFO L225 Difference]: With dead ends: 148 [2021-07-09 17:27:00,239 INFO L226 Difference]: Without dead ends: 148 [2021-07-09 17:27:00,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-09 17:27:00,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-07-09 17:27:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2457627118644066) internal successors, (265), 118 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:00,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 265 transitions. [2021-07-09 17:27:00,241 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 265 transitions. Word has length 17 [2021-07-09 17:27:00,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:00,241 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 265 transitions. [2021-07-09 17:27:00,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:00,241 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 265 transitions. [2021-07-09 17:27:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:00,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:00,241 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:00,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-07-09 17:27:00,442 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash -319138145, now seen corresponding path program 78 times [2021-07-09 17:27:00,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:00,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509549588] [2021-07-09 17:27:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:00,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:00,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509549588] [2021-07-09 17:27:00,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509549588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:00,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658008729] [2021-07-09 17:27:00,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:00,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:27:00,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:00,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:00,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:00,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658008729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:00,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:00,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:00,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014494313] [2021-07-09 17:27:00,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:00,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:00,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:00,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:00,720 INFO L87 Difference]: Start difference. First operand 119 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:00,783 INFO L93 Difference]: Finished difference Result 135 states and 295 transitions. [2021-07-09 17:27:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:00,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:00,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:00,783 INFO L225 Difference]: With dead ends: 135 [2021-07-09 17:27:00,783 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 17:27:00,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:00,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 17:27:00,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 120. [2021-07-09 17:27:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-07-09 17:27:00,785 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-07-09 17:27:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:00,785 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-07-09 17:27:00,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:00,786 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-07-09 17:27:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:00,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:00,786 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:01,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:01,002 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:01,003 INFO L82 PathProgramCache]: Analyzing trace with hash 568562368, now seen corresponding path program 79 times [2021-07-09 17:27:01,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:01,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858269425] [2021-07-09 17:27:01,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:01,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:01,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858269425] [2021-07-09 17:27:01,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858269425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:01,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916406731] [2021-07-09 17:27:01,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:01,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:01,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916406731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:01,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:01,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:01,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930503000] [2021-07-09 17:27:01,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:01,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:01,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:01,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:01,237 INFO L87 Difference]: Start difference. First operand 120 states and 267 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:01,353 INFO L93 Difference]: Finished difference Result 146 states and 317 transitions. [2021-07-09 17:27:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:01,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:01,354 INFO L225 Difference]: With dead ends: 146 [2021-07-09 17:27:01,354 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:27:01,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:27:01,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2021-07-09 17:27:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-07-09 17:27:01,356 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-07-09 17:27:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:01,356 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-07-09 17:27:01,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-07-09 17:27:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:01,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:01,357 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:01,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:01,561 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1365298120, now seen corresponding path program 80 times [2021-07-09 17:27:01,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:01,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645271857] [2021-07-09 17:27:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:01,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:01,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645271857] [2021-07-09 17:27:01,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645271857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:01,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889833652] [2021-07-09 17:27:01,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:01,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:01,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:01,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:01,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889833652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:01,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:01,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:01,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578693269] [2021-07-09 17:27:01,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:01,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:01,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:01,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:01,815 INFO L87 Difference]: Start difference. First operand 120 states and 267 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:01,973 INFO L93 Difference]: Finished difference Result 146 states and 317 transitions. [2021-07-09 17:27:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:27:01,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:01,974 INFO L225 Difference]: With dead ends: 146 [2021-07-09 17:27:01,974 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:27:01,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:01,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:27:01,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2021-07-09 17:27:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-07-09 17:27:01,976 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-07-09 17:27:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:01,976 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-07-09 17:27:01,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:01,976 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-07-09 17:27:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:01,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:01,977 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:02,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-07-09 17:27:02,185 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:02,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:02,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1652848355, now seen corresponding path program 81 times [2021-07-09 17:27:02,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:02,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580957542] [2021-07-09 17:27:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:02,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:02,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580957542] [2021-07-09 17:27:02,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580957542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:02,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876894896] [2021-07-09 17:27:02,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:02,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:27:02,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:02,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:02,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:02,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876894896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:02,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:02,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:02,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402995513] [2021-07-09 17:27:02,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:02,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:02,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:02,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:02,479 INFO L87 Difference]: Start difference. First operand 120 states and 267 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:02,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:02,659 INFO L93 Difference]: Finished difference Result 143 states and 310 transitions. [2021-07-09 17:27:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:02,659 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:02,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:02,660 INFO L225 Difference]: With dead ends: 143 [2021-07-09 17:27:02,660 INFO L226 Difference]: Without dead ends: 143 [2021-07-09 17:27:02,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 292.9ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-09 17:27:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 117. [2021-07-09 17:27:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2327586206896552) internal successors, (259), 116 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 259 transitions. [2021-07-09 17:27:02,661 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 259 transitions. Word has length 17 [2021-07-09 17:27:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:02,662 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 259 transitions. [2021-07-09 17:27:02,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:02,662 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 259 transitions. [2021-07-09 17:27:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:02,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:02,662 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:02,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-07-09 17:27:02,878 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:02,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:02,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1871644386, now seen corresponding path program 82 times [2021-07-09 17:27:02,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:02,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291228492] [2021-07-09 17:27:02,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:02,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:02,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291228492] [2021-07-09 17:27:02,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291228492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:02,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723465948] [2021-07-09 17:27:02,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:02,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:02,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:02,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:02,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:03,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723465948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:03,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:03,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:03,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143760328] [2021-07-09 17:27:03,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:03,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:03,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:03,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:03,158 INFO L87 Difference]: Start difference. First operand 117 states and 259 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:03,352 INFO L93 Difference]: Finished difference Result 153 states and 321 transitions. [2021-07-09 17:27:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:03,353 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:03,353 INFO L225 Difference]: With dead ends: 153 [2021-07-09 17:27:03,353 INFO L226 Difference]: Without dead ends: 153 [2021-07-09 17:27:03,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:03,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-09 17:27:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 118. [2021-07-09 17:27:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.230769230769231) internal successors, (261), 117 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 261 transitions. [2021-07-09 17:27:03,355 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 261 transitions. Word has length 17 [2021-07-09 17:27:03,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:03,355 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 261 transitions. [2021-07-09 17:27:03,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 261 transitions. [2021-07-09 17:27:03,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:03,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:03,356 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:03,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-07-09 17:27:03,572 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:03,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:03,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2135772675, now seen corresponding path program 83 times [2021-07-09 17:27:03,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:03,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132845921] [2021-07-09 17:27:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:03,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:03,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132845921] [2021-07-09 17:27:03,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132845921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:03,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979741228] [2021-07-09 17:27:03,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:03,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:27:03,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:03,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:03,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:03,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979741228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:03,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:03,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:03,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260008557] [2021-07-09 17:27:03,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:03,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:03,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:03,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:03,822 INFO L87 Difference]: Start difference. First operand 118 states and 261 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:04,115 INFO L93 Difference]: Finished difference Result 196 states and 397 transitions. [2021-07-09 17:27:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:27:04,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:04,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:04,116 INFO L225 Difference]: With dead ends: 196 [2021-07-09 17:27:04,116 INFO L226 Difference]: Without dead ends: 196 [2021-07-09 17:27:04,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 339.2ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:04,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-07-09 17:27:04,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 119. [2021-07-09 17:27:04,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2542372881355934) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 266 transitions. [2021-07-09 17:27:04,123 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 266 transitions. Word has length 17 [2021-07-09 17:27:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:04,123 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 266 transitions. [2021-07-09 17:27:04,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 266 transitions. [2021-07-09 17:27:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:04,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:04,124 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:04,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-07-09 17:27:04,324 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:04,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash 199159296, now seen corresponding path program 84 times [2021-07-09 17:27:04,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:04,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758030993] [2021-07-09 17:27:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:04,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:04,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758030993] [2021-07-09 17:27:04,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758030993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:04,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739726075] [2021-07-09 17:27:04,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:04,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:27:04,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:04,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:04,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:04,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739726075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:04,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:04,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:04,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510777020] [2021-07-09 17:27:04,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:04,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:04,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:04,592 INFO L87 Difference]: Start difference. First operand 119 states and 266 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:04,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:04,774 INFO L93 Difference]: Finished difference Result 140 states and 301 transitions. [2021-07-09 17:27:04,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:04,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:04,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:04,775 INFO L225 Difference]: With dead ends: 140 [2021-07-09 17:27:04,775 INFO L226 Difference]: Without dead ends: 134 [2021-07-09 17:27:04,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-09 17:27:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2021-07-09 17:27:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2457627118644066) internal successors, (265), 118 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 265 transitions. [2021-07-09 17:27:04,777 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 265 transitions. Word has length 17 [2021-07-09 17:27:04,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:04,777 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 265 transitions. [2021-07-09 17:27:04,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:04,777 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 265 transitions. [2021-07-09 17:27:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:04,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:04,778 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:04,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-07-09 17:27:04,994 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:04,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:04,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1833782395, now seen corresponding path program 85 times [2021-07-09 17:27:04,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:04,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510615997] [2021-07-09 17:27:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:05,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:05,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510615997] [2021-07-09 17:27:05,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510615997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:05,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290697685] [2021-07-09 17:27:05,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:05,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:05,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:05,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290697685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:05,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:05,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:05,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421466699] [2021-07-09 17:27:05,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:05,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:05,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:05,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:05,247 INFO L87 Difference]: Start difference. First operand 119 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:05,427 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2021-07-09 17:27:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:05,427 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:05,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:05,428 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:27:05,428 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:27:05,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:05,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:27:05,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 116. [2021-07-09 17:27:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.226086956521739) internal successors, (256), 115 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:05,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 256 transitions. [2021-07-09 17:27:05,429 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 256 transitions. Word has length 17 [2021-07-09 17:27:05,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:05,429 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 256 transitions. [2021-07-09 17:27:05,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:05,430 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 256 transitions. [2021-07-09 17:27:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:05,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:05,430 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:05,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-07-09 17:27:05,630 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:05,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:05,631 INFO L82 PathProgramCache]: Analyzing trace with hash -111496436, now seen corresponding path program 86 times [2021-07-09 17:27:05,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:05,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335197583] [2021-07-09 17:27:05,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:05,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:05,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335197583] [2021-07-09 17:27:05,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335197583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:05,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212481389] [2021-07-09 17:27:05,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:05,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:05,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:05,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:05,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:05,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212481389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:05,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:05,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:27:05,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986736244] [2021-07-09 17:27:05,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:05,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:05,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:05,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:05,863 INFO L87 Difference]: Start difference. First operand 116 states and 256 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:06,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:06,110 INFO L93 Difference]: Finished difference Result 136 states and 296 transitions. [2021-07-09 17:27:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:06,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:06,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:06,111 INFO L225 Difference]: With dead ends: 136 [2021-07-09 17:27:06,111 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:27:06,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:06,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:27:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 116. [2021-07-09 17:27:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.226086956521739) internal successors, (256), 115 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 256 transitions. [2021-07-09 17:27:06,113 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 256 transitions. Word has length 17 [2021-07-09 17:27:06,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:06,113 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 256 transitions. [2021-07-09 17:27:06,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:06,113 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 256 transitions. [2021-07-09 17:27:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:06,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:06,114 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:06,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-07-09 17:27:06,321 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:06,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:06,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1182491900, now seen corresponding path program 87 times [2021-07-09 17:27:06,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:06,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681862942] [2021-07-09 17:27:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:06,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:06,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681862942] [2021-07-09 17:27:06,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681862942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:06,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100285312] [2021-07-09 17:27:06,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:06,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:27:06,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:06,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:06,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:06,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100285312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:06,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:06,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:06,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995776522] [2021-07-09 17:27:06,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:06,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:06,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:06,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:06,613 INFO L87 Difference]: Start difference. First operand 116 states and 256 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:06,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:06,922 INFO L93 Difference]: Finished difference Result 142 states and 308 transitions. [2021-07-09 17:27:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:06,923 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:06,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:06,923 INFO L225 Difference]: With dead ends: 142 [2021-07-09 17:27:06,923 INFO L226 Difference]: Without dead ends: 142 [2021-07-09 17:27:06,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 430.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-09 17:27:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2021-07-09 17:27:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2327586206896552) internal successors, (259), 116 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 259 transitions. [2021-07-09 17:27:06,925 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 259 transitions. Word has length 17 [2021-07-09 17:27:06,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:06,925 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 259 transitions. [2021-07-09 17:27:06,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:06,925 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 259 transitions. [2021-07-09 17:27:06,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:06,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:06,925 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:07,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-07-09 17:27:07,126 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:07,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:07,126 INFO L82 PathProgramCache]: Analyzing trace with hash 984390345, now seen corresponding path program 88 times [2021-07-09 17:27:07,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:07,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500379117] [2021-07-09 17:27:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:07,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:07,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500379117] [2021-07-09 17:27:07,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500379117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:07,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880362661] [2021-07-09 17:27:07,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:07,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:07,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:07,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:07,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:07,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880362661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:07,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:07,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:07,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539405322] [2021-07-09 17:27:07,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:07,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:07,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:07,391 INFO L87 Difference]: Start difference. First operand 117 states and 259 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:07,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:07,576 INFO L93 Difference]: Finished difference Result 160 states and 328 transitions. [2021-07-09 17:27:07,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:07,576 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:07,577 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:27:07,577 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:27:07,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:07,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:27:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 123. [2021-07-09 17:27:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.2295081967213113) internal successors, (272), 122 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 272 transitions. [2021-07-09 17:27:07,579 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 272 transitions. Word has length 17 [2021-07-09 17:27:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:07,579 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 272 transitions. [2021-07-09 17:27:07,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 272 transitions. [2021-07-09 17:27:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:07,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:07,579 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:07,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:07,781 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash 741639945, now seen corresponding path program 89 times [2021-07-09 17:27:07,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:07,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633518335] [2021-07-09 17:27:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:07,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:07,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633518335] [2021-07-09 17:27:07,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633518335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:07,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256837911] [2021-07-09 17:27:07,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:07,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:27:07,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:07,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:07,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:08,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256837911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:08,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:08,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:08,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892841383] [2021-07-09 17:27:08,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:08,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:08,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:08,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:08,055 INFO L87 Difference]: Start difference. First operand 123 states and 272 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:08,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:08,167 INFO L93 Difference]: Finished difference Result 134 states and 291 transitions. [2021-07-09 17:27:08,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:08,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:08,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:08,168 INFO L225 Difference]: With dead ends: 134 [2021-07-09 17:27:08,168 INFO L226 Difference]: Without dead ends: 134 [2021-07-09 17:27:08,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:08,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-09 17:27:08,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2021-07-09 17:27:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-07-09 17:27:08,170 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-07-09 17:27:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:08,170 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-07-09 17:27:08,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-07-09 17:27:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:08,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:08,171 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:08,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:08,385 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:08,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:08,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1629340458, now seen corresponding path program 90 times [2021-07-09 17:27:08,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:08,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986564038] [2021-07-09 17:27:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:08,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:08,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986564038] [2021-07-09 17:27:08,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986564038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:08,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138691868] [2021-07-09 17:27:08,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:08,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:27:08,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:08,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:08,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:08,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138691868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:08,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:08,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:08,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41482154] [2021-07-09 17:27:08,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:08,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:08,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:08,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:08,642 INFO L87 Difference]: Start difference. First operand 115 states and 254 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:08,753 INFO L93 Difference]: Finished difference Result 134 states and 292 transitions. [2021-07-09 17:27:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:08,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:08,754 INFO L225 Difference]: With dead ends: 134 [2021-07-09 17:27:08,754 INFO L226 Difference]: Without dead ends: 134 [2021-07-09 17:27:08,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-09 17:27:08,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2021-07-09 17:27:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-07-09 17:27:08,756 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-07-09 17:27:08,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:08,756 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-07-09 17:27:08,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:08,756 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-07-09 17:27:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:08,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:08,756 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:08,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:08,957 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:08,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:08,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1868891086, now seen corresponding path program 91 times [2021-07-09 17:27:08,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:08,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612649767] [2021-07-09 17:27:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:09,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:09,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612649767] [2021-07-09 17:27:09,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612649767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:09,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40899816] [2021-07-09 17:27:09,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:09,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:09,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:09,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40899816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:09,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:09,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:09,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661113692] [2021-07-09 17:27:09,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:09,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:09,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:09,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:09,208 INFO L87 Difference]: Start difference. First operand 115 states and 254 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:09,454 INFO L93 Difference]: Finished difference Result 148 states and 315 transitions. [2021-07-09 17:27:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:09,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:09,455 INFO L225 Difference]: With dead ends: 148 [2021-07-09 17:27:09,455 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:27:09,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 320.3ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:27:09,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 115. [2021-07-09 17:27:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.219298245614035) internal successors, (253), 114 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 253 transitions. [2021-07-09 17:27:09,457 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 253 transitions. Word has length 17 [2021-07-09 17:27:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:09,457 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 253 transitions. [2021-07-09 17:27:09,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 253 transitions. [2021-07-09 17:27:09,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:09,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:09,457 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:09,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-07-09 17:27:09,658 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash -741494993, now seen corresponding path program 92 times [2021-07-09 17:27:09,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:09,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366478590] [2021-07-09 17:27:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:09,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:09,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366478590] [2021-07-09 17:27:09,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366478590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:09,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457633724] [2021-07-09 17:27:09,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:09,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:09,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:09,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:09,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:09,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457633724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:09,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:09,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:09,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080999752] [2021-07-09 17:27:09,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:09,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:09,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:09,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:09,964 INFO L87 Difference]: Start difference. First operand 115 states and 253 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:10,150 INFO L93 Difference]: Finished difference Result 133 states and 285 transitions. [2021-07-09 17:27:10,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:10,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:10,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:10,151 INFO L225 Difference]: With dead ends: 133 [2021-07-09 17:27:10,151 INFO L226 Difference]: Without dead ends: 131 [2021-07-09 17:27:10,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-09 17:27:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2021-07-09 17:27:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.2142857142857144) internal successors, (248), 112 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 248 transitions. [2021-07-09 17:27:10,153 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 248 transitions. Word has length 17 [2021-07-09 17:27:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:10,153 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 248 transitions. [2021-07-09 17:27:10,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 248 transitions. [2021-07-09 17:27:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:10,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:10,153 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:10,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:10,354 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:10,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:10,354 INFO L82 PathProgramCache]: Analyzing trace with hash -235148727, now seen corresponding path program 93 times [2021-07-09 17:27:10,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:10,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863234113] [2021-07-09 17:27:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:10,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:10,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863234113] [2021-07-09 17:27:10,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863234113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:10,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614903803] [2021-07-09 17:27:10,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:10,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:27:10,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:10,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:10,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:10,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614903803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:10,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:10,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:10,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850273650] [2021-07-09 17:27:10,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:10,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:10,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:10,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:10,592 INFO L87 Difference]: Start difference. First operand 113 states and 248 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:10,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:10,831 INFO L93 Difference]: Finished difference Result 184 states and 371 transitions. [2021-07-09 17:27:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:27:10,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:10,831 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:27:10,832 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:27:10,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 258.7ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:27:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 115. [2021-07-09 17:27:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.236842105263158) internal successors, (255), 114 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:10,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 255 transitions. [2021-07-09 17:27:10,833 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 255 transitions. Word has length 17 [2021-07-09 17:27:10,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:10,834 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 255 transitions. [2021-07-09 17:27:10,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:10,834 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 255 transitions. [2021-07-09 17:27:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:10,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:10,834 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:11,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-07-09 17:27:11,051 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:11,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:11,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1259937386, now seen corresponding path program 94 times [2021-07-09 17:27:11,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:11,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164690003] [2021-07-09 17:27:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:11,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:11,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164690003] [2021-07-09 17:27:11,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164690003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:11,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506011052] [2021-07-09 17:27:11,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:11,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:11,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:11,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:11,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:11,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506011052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:11,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:11,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:11,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576458613] [2021-07-09 17:27:11,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:11,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:11,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:11,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:11,331 INFO L87 Difference]: Start difference. First operand 115 states and 255 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:11,491 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2021-07-09 17:27:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:11,492 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:11,492 INFO L225 Difference]: With dead ends: 144 [2021-07-09 17:27:11,492 INFO L226 Difference]: Without dead ends: 138 [2021-07-09 17:27:11,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-09 17:27:11,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2021-07-09 17:27:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.2) internal successors, (264), 120 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 264 transitions. [2021-07-09 17:27:11,494 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 264 transitions. Word has length 17 [2021-07-09 17:27:11,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:11,494 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 264 transitions. [2021-07-09 17:27:11,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:11,494 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 264 transitions. [2021-07-09 17:27:11,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:11,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:11,495 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:11,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:11,711 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:11,712 INFO L82 PathProgramCache]: Analyzing trace with hash -773004305, now seen corresponding path program 95 times [2021-07-09 17:27:11,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:11,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901755746] [2021-07-09 17:27:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:11,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:11,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901755746] [2021-07-09 17:27:11,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901755746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:11,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058987328] [2021-07-09 17:27:11,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:11,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:27:11,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:11,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:11,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:11,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058987328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:11,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:11,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:11,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632252806] [2021-07-09 17:27:11,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:11,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:11,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:11,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:11,955 INFO L87 Difference]: Start difference. First operand 121 states and 264 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:12,110 INFO L93 Difference]: Finished difference Result 142 states and 303 transitions. [2021-07-09 17:27:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:27:12,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:12,111 INFO L225 Difference]: With dead ends: 142 [2021-07-09 17:27:12,111 INFO L226 Difference]: Without dead ends: 142 [2021-07-09 17:27:12,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:12,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-09 17:27:12,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 119. [2021-07-09 17:27:12,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-07-09 17:27:12,113 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-07-09 17:27:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:12,113 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-07-09 17:27:12,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-07-09 17:27:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:12,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:12,114 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:12,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-07-09 17:27:12,314 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:12,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1398169660, now seen corresponding path program 96 times [2021-07-09 17:27:12,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:12,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40629273] [2021-07-09 17:27:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:12,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:12,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40629273] [2021-07-09 17:27:12,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40629273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:12,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948688264] [2021-07-09 17:27:12,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:12,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:27:12,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:12,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:12,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948688264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:12,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:12,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:12,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236113696] [2021-07-09 17:27:12,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:12,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:12,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:12,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:12,567 INFO L87 Difference]: Start difference. First operand 119 states and 257 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:12,706 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2021-07-09 17:27:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:27:12,706 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:12,707 INFO L225 Difference]: With dead ends: 138 [2021-07-09 17:27:12,707 INFO L226 Difference]: Without dead ends: 138 [2021-07-09 17:27:12,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:12,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-09 17:27:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2021-07-09 17:27:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-07-09 17:27:12,709 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-07-09 17:27:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:12,709 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-07-09 17:27:12,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-07-09 17:27:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:12,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:12,709 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:12,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-07-09 17:27:12,910 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:12,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:12,910 INFO L82 PathProgramCache]: Analyzing trace with hash -601433908, now seen corresponding path program 97 times [2021-07-09 17:27:12,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:12,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379092484] [2021-07-09 17:27:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:13,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:13,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379092484] [2021-07-09 17:27:13,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379092484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:13,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025848754] [2021-07-09 17:27:13,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:13,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:13,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:13,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025848754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:13,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:13,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:13,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320446073] [2021-07-09 17:27:13,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:13,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:13,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:13,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:13,165 INFO L87 Difference]: Start difference. First operand 119 states and 257 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:13,304 INFO L93 Difference]: Finished difference Result 148 states and 315 transitions. [2021-07-09 17:27:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:27:13,304 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:13,305 INFO L225 Difference]: With dead ends: 148 [2021-07-09 17:27:13,305 INFO L226 Difference]: Without dead ends: 148 [2021-07-09 17:27:13,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:13,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-09 17:27:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-07-09 17:27:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-07-09 17:27:13,306 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-07-09 17:27:13,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:13,307 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-07-09 17:27:13,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-07-09 17:27:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:13,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:13,307 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:13,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:13,524 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:13,524 INFO L82 PathProgramCache]: Analyzing trace with hash -313883673, now seen corresponding path program 98 times [2021-07-09 17:27:13,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:13,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131084378] [2021-07-09 17:27:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:13,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:13,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131084378] [2021-07-09 17:27:13,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131084378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:13,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618865290] [2021-07-09 17:27:13,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:13,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:13,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:13,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:13,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:13,911 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 17:27:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:13,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618865290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:13,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:13,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:13,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546105874] [2021-07-09 17:27:13,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:13,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:13,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:13,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:13,959 INFO L87 Difference]: Start difference. First operand 119 states and 257 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:14,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:14,132 INFO L93 Difference]: Finished difference Result 134 states and 282 transitions. [2021-07-09 17:27:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:27:14,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:14,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:14,133 INFO L225 Difference]: With dead ends: 134 [2021-07-09 17:27:14,133 INFO L226 Difference]: Without dead ends: 134 [2021-07-09 17:27:14,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:14,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-09 17:27:14,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2021-07-09 17:27:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-07-09 17:27:14,135 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-07-09 17:27:14,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:14,135 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-07-09 17:27:14,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:14,135 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-07-09 17:27:14,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:14,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:14,135 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:14,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:14,352 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:14,352 INFO L82 PathProgramCache]: Analyzing trace with hash -302282879, now seen corresponding path program 99 times [2021-07-09 17:27:14,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:14,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95548008] [2021-07-09 17:27:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:14,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:14,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95548008] [2021-07-09 17:27:14,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95548008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:14,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206367536] [2021-07-09 17:27:14,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:14,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:27:14,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:14,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:14,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:14,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206367536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:14,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:14,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:14,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531844551] [2021-07-09 17:27:14,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:14,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:14,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:14,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:14,595 INFO L87 Difference]: Start difference. First operand 112 states and 236 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:14,838 INFO L93 Difference]: Finished difference Result 150 states and 305 transitions. [2021-07-09 17:27:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:14,838 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:14,838 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:27:14,838 INFO L226 Difference]: Without dead ends: 148 [2021-07-09 17:27:14,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:14,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-09 17:27:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 118. [2021-07-09 17:27:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1367521367521367) internal successors, (250), 117 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 250 transitions. [2021-07-09 17:27:14,840 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 250 transitions. Word has length 17 [2021-07-09 17:27:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:14,840 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 250 transitions. [2021-07-09 17:27:14,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 250 transitions. [2021-07-09 17:27:14,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:14,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:14,840 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:15,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-07-09 17:27:15,041 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:15,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:15,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1032308451, now seen corresponding path program 100 times [2021-07-09 17:27:15,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:15,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650353549] [2021-07-09 17:27:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:15,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:15,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650353549] [2021-07-09 17:27:15,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650353549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:15,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530807080] [2021-07-09 17:27:15,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:15,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:15,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:15,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:15,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:15,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530807080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:15,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:15,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:15,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588931498] [2021-07-09 17:27:15,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:15,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:15,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:15,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:15,391 INFO L87 Difference]: Start difference. First operand 118 states and 250 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:15,677 INFO L93 Difference]: Finished difference Result 156 states and 319 transitions. [2021-07-09 17:27:15,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:15,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:15,678 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:27:15,678 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:27:15,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 399.4ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:27:15,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-07-09 17:27:15,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1379310344827585) internal successors, (248), 116 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 248 transitions. [2021-07-09 17:27:15,680 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 248 transitions. Word has length 17 [2021-07-09 17:27:15,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:15,680 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 248 transitions. [2021-07-09 17:27:15,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:15,680 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 248 transitions. [2021-07-09 17:27:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:15,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:15,680 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:15,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:15,881 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:15,881 INFO L82 PathProgramCache]: Analyzing trace with hash 494452873, now seen corresponding path program 101 times [2021-07-09 17:27:15,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:15,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766340576] [2021-07-09 17:27:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:15,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:15,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766340576] [2021-07-09 17:27:15,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766340576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:15,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850629325] [2021-07-09 17:27:15,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:16,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:27:16,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:16,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:16,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:16,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850629325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:16,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:16,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:16,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204397137] [2021-07-09 17:27:16,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:16,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:16,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:16,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:16,122 INFO L87 Difference]: Start difference. First operand 117 states and 248 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:16,280 INFO L93 Difference]: Finished difference Result 136 states and 284 transitions. [2021-07-09 17:27:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:16,281 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:16,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:16,281 INFO L225 Difference]: With dead ends: 136 [2021-07-09 17:27:16,281 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:27:16,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:27:16,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 111. [2021-07-09 17:27:16,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1272727272727274) internal successors, (234), 110 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:16,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 234 transitions. [2021-07-09 17:27:16,283 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 234 transitions. Word has length 17 [2021-07-09 17:27:16,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:16,283 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 234 transitions. [2021-07-09 17:27:16,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 234 transitions. [2021-07-09 17:27:16,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:16,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:16,283 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:16,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-07-09 17:27:16,499 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:16,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:16,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1578222580, now seen corresponding path program 102 times [2021-07-09 17:27:16,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:16,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676918201] [2021-07-09 17:27:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:16,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:16,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676918201] [2021-07-09 17:27:16,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676918201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:16,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580788009] [2021-07-09 17:27:16,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:16,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:27:16,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:16,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:16,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:16,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580788009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:16,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:16,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:16,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274024572] [2021-07-09 17:27:16,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:16,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:16,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:16,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:16,808 INFO L87 Difference]: Start difference. First operand 111 states and 234 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:16,924 INFO L93 Difference]: Finished difference Result 127 states and 266 transitions. [2021-07-09 17:27:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:16,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:16,925 INFO L225 Difference]: With dead ends: 127 [2021-07-09 17:27:16,925 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:27:16,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:27:16,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2021-07-09 17:27:16,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1238938053097347) internal successors, (240), 113 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 240 transitions. [2021-07-09 17:27:16,926 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 240 transitions. Word has length 17 [2021-07-09 17:27:16,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:16,926 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 240 transitions. [2021-07-09 17:27:16,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 240 transitions. [2021-07-09 17:27:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:16,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:16,926 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:17,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:17,127 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:17,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1290672345, now seen corresponding path program 103 times [2021-07-09 17:27:17,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:17,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401160407] [2021-07-09 17:27:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:17,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:17,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401160407] [2021-07-09 17:27:17,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401160407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:17,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138711206] [2021-07-09 17:27:17,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:17,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:17,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138711206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:17,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:17,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:17,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845511801] [2021-07-09 17:27:17,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:17,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:17,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:17,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:17,367 INFO L87 Difference]: Start difference. First operand 114 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:17,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:17,703 INFO L93 Difference]: Finished difference Result 157 states and 322 transitions. [2021-07-09 17:27:17,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:27:17,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:17,704 INFO L225 Difference]: With dead ends: 157 [2021-07-09 17:27:17,704 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:27:17,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:27:17,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2021-07-09 17:27:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1452991452991452) internal successors, (251), 117 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 251 transitions. [2021-07-09 17:27:17,706 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 251 transitions. Word has length 17 [2021-07-09 17:27:17,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:17,706 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 251 transitions. [2021-07-09 17:27:17,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:17,706 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 251 transitions. [2021-07-09 17:27:17,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:17,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:17,706 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:17,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-07-09 17:27:17,916 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:17,917 INFO L82 PathProgramCache]: Analyzing trace with hash -988682065, now seen corresponding path program 104 times [2021-07-09 17:27:17,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:17,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829766722] [2021-07-09 17:27:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:17,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:17,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829766722] [2021-07-09 17:27:18,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829766722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:18,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941973200] [2021-07-09 17:27:18,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:18,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:18,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:18,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:18,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941973200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:18,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:18,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:18,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297081729] [2021-07-09 17:27:18,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:18,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:18,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:18,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:18,159 INFO L87 Difference]: Start difference. First operand 118 states and 251 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:18,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:18,437 INFO L93 Difference]: Finished difference Result 145 states and 303 transitions. [2021-07-09 17:27:18,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:18,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:18,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:18,437 INFO L225 Difference]: With dead ends: 145 [2021-07-09 17:27:18,437 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:27:18,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 346.5ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:27:18,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 117. [2021-07-09 17:27:18,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-07-09 17:27:18,439 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-07-09 17:27:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:18,439 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-07-09 17:27:18,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-07-09 17:27:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:18,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:18,439 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:18,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable638 [2021-07-09 17:27:18,640 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:18,640 INFO L82 PathProgramCache]: Analyzing trace with hash -482335799, now seen corresponding path program 105 times [2021-07-09 17:27:18,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:18,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202192275] [2021-07-09 17:27:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:18,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:18,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202192275] [2021-07-09 17:27:18,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202192275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:18,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562383085] [2021-07-09 17:27:18,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:18,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:27:18,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:18,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:18,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:18,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562383085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:18,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:18,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:27:18,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522563280] [2021-07-09 17:27:18,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:18,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:18,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:18,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:18,859 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:19,078 INFO L93 Difference]: Finished difference Result 137 states and 286 transitions. [2021-07-09 17:27:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:19,078 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:19,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:19,078 INFO L225 Difference]: With dead ends: 137 [2021-07-09 17:27:19,078 INFO L226 Difference]: Without dead ends: 137 [2021-07-09 17:27:19,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:19,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-09 17:27:19,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2021-07-09 17:27:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1339285714285716) internal successors, (239), 112 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 239 transitions. [2021-07-09 17:27:19,080 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 239 transitions. Word has length 17 [2021-07-09 17:27:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:19,080 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 239 transitions. [2021-07-09 17:27:19,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,080 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 239 transitions. [2021-07-09 17:27:19,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:19,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:19,080 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:19,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-07-09 17:27:19,281 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:19,281 INFO L82 PathProgramCache]: Analyzing trace with hash 425996420, now seen corresponding path program 106 times [2021-07-09 17:27:19,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:19,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374685387] [2021-07-09 17:27:19,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:19,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:19,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374685387] [2021-07-09 17:27:19,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374685387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:19,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497777182] [2021-07-09 17:27:19,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:19,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:19,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:19,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:19,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:19,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497777182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:19,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:19,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:27:19,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380087451] [2021-07-09 17:27:19,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:19,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:19,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:19,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:19,480 INFO L87 Difference]: Start difference. First operand 113 states and 239 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:19,630 INFO L93 Difference]: Finished difference Result 124 states and 260 transitions. [2021-07-09 17:27:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:19,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:19,631 INFO L225 Difference]: With dead ends: 124 [2021-07-09 17:27:19,631 INFO L226 Difference]: Without dead ends: 124 [2021-07-09 17:27:19,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:19,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-07-09 17:27:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2021-07-09 17:27:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1339285714285716) internal successors, (239), 112 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 239 transitions. [2021-07-09 17:27:19,632 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 239 transitions. Word has length 17 [2021-07-09 17:27:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:19,632 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 239 transitions. [2021-07-09 17:27:19,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 239 transitions. [2021-07-09 17:27:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:19,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:19,633 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:19,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable644,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:19,841 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:19,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:19,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1120130721, now seen corresponding path program 107 times [2021-07-09 17:27:19,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:19,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461009217] [2021-07-09 17:27:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:19,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:19,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461009217] [2021-07-09 17:27:19,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461009217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:19,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977023645] [2021-07-09 17:27:19,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:20,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:27:20,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:20,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:20,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:20,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977023645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:20,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:20,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:27:20,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388173016] [2021-07-09 17:27:20,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:20,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:20,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:20,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:20,185 INFO L87 Difference]: Start difference. First operand 113 states and 239 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:20,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:20,386 INFO L93 Difference]: Finished difference Result 119 states and 246 transitions. [2021-07-09 17:27:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:20,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:20,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:20,387 INFO L225 Difference]: With dead ends: 119 [2021-07-09 17:27:20,387 INFO L226 Difference]: Without dead ends: 113 [2021-07-09 17:27:20,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:20,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-09 17:27:20,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-07-09 17:27:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-07-09 17:27:20,389 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 17 [2021-07-09 17:27:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:20,389 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-07-09 17:27:20,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:20,389 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-07-09 17:27:20,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:20,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:20,389 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:20,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:20,607 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:20,607 INFO L82 PathProgramCache]: Analyzing trace with hash -644999044, now seen corresponding path program 108 times [2021-07-09 17:27:20,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:20,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434920552] [2021-07-09 17:27:20,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:20,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:20,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434920552] [2021-07-09 17:27:20,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434920552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:20,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779610709] [2021-07-09 17:27:20,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:20,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:27:20,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:20,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:20,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:20,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779610709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:20,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:20,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:20,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198478179] [2021-07-09 17:27:20,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:20,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:20,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:20,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:20,814 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:21,078 INFO L93 Difference]: Finished difference Result 133 states and 277 transitions. [2021-07-09 17:27:21,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:21,078 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:21,079 INFO L225 Difference]: With dead ends: 133 [2021-07-09 17:27:21,079 INFO L226 Difference]: Without dead ends: 133 [2021-07-09 17:27:21,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 323.5ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:21,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-09 17:27:21,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 113. [2021-07-09 17:27:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-07-09 17:27:21,080 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 17 [2021-07-09 17:27:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:21,080 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-07-09 17:27:21,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-07-09 17:27:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:21,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:21,081 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:21,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-07-09 17:27:21,281 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1521883201, now seen corresponding path program 109 times [2021-07-09 17:27:21,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:21,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691193943] [2021-07-09 17:27:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:21,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:21,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691193943] [2021-07-09 17:27:21,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691193943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:21,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884093729] [2021-07-09 17:27:21,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:21,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:21,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:21,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884093729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:21,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:21,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:21,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478882459] [2021-07-09 17:27:21,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:21,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:21,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:21,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:21,537 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:21,721 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-07-09 17:27:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:21,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:21,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:21,721 INFO L225 Difference]: With dead ends: 151 [2021-07-09 17:27:21,721 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 17:27:21,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:21,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 17:27:21,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 119. [2021-07-09 17:27:21,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1271186440677967) internal successors, (251), 118 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 251 transitions. [2021-07-09 17:27:21,723 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 251 transitions. Word has length 17 [2021-07-09 17:27:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:21,723 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 251 transitions. [2021-07-09 17:27:21,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,723 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 251 transitions. [2021-07-09 17:27:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:21,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:21,723 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:21,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-07-09 17:27:21,924 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:21,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1279132801, now seen corresponding path program 110 times [2021-07-09 17:27:21,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:21,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892956820] [2021-07-09 17:27:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:21,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:21,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892956820] [2021-07-09 17:27:21,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892956820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:21,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036442955] [2021-07-09 17:27:21,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:22,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:22,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:22,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:27:22,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:22,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036442955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:22,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:22,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:22,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360990740] [2021-07-09 17:27:22,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:22,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:22,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:22,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:22,207 INFO L87 Difference]: Start difference. First operand 119 states and 251 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:22,305 INFO L93 Difference]: Finished difference Result 125 states and 260 transitions. [2021-07-09 17:27:22,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:22,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:22,306 INFO L225 Difference]: With dead ends: 125 [2021-07-09 17:27:22,306 INFO L226 Difference]: Without dead ends: 125 [2021-07-09 17:27:22,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:22,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-09 17:27:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2021-07-09 17:27:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-07-09 17:27:22,307 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-07-09 17:27:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:22,308 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-07-09 17:27:22,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:22,308 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-07-09 17:27:22,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:22,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:22,308 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:22,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:22,513 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:22,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2128133982, now seen corresponding path program 111 times [2021-07-09 17:27:22,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:22,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158147695] [2021-07-09 17:27:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:22,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:22,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158147695] [2021-07-09 17:27:22,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158147695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:22,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842334872] [2021-07-09 17:27:22,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:22,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:27:22,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:22,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:22,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:22,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842334872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:22,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:22,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:22,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428968152] [2021-07-09 17:27:22,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:22,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:22,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:22,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:22,740 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:22,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:22,876 INFO L93 Difference]: Finished difference Result 125 states and 261 transitions. [2021-07-09 17:27:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:22,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:22,876 INFO L225 Difference]: With dead ends: 125 [2021-07-09 17:27:22,876 INFO L226 Difference]: Without dead ends: 125 [2021-07-09 17:27:22,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-09 17:27:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2021-07-09 17:27:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-07-09 17:27:22,878 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-07-09 17:27:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:22,878 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-07-09 17:27:22,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-07-09 17:27:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:22,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:22,878 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:23,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-07-09 17:27:23,079 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:23,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:23,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1331398230, now seen corresponding path program 112 times [2021-07-09 17:27:23,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:23,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279477112] [2021-07-09 17:27:23,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:23,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:23,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279477112] [2021-07-09 17:27:23,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279477112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:23,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183728489] [2021-07-09 17:27:23,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:23,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:23,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:23,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:23,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:23,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183728489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:23,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:23,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:23,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255390995] [2021-07-09 17:27:23,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:23,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:23,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:23,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:23,295 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:23,499 INFO L93 Difference]: Finished difference Result 134 states and 279 transitions. [2021-07-09 17:27:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:23,499 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:23,499 INFO L225 Difference]: With dead ends: 134 [2021-07-09 17:27:23,499 INFO L226 Difference]: Without dead ends: 134 [2021-07-09 17:27:23,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-09 17:27:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2021-07-09 17:27:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:23,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-07-09 17:27:23,501 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-07-09 17:27:23,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:23,501 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-07-09 17:27:23,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:23,501 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-07-09 17:27:23,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:23,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:23,501 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:23,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:23,702 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:23,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:23,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1043847995, now seen corresponding path program 113 times [2021-07-09 17:27:23,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:23,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161755023] [2021-07-09 17:27:23,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:23,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:23,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161755023] [2021-07-09 17:27:23,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161755023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:23,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162755956] [2021-07-09 17:27:23,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:23,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:27:23,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:23,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:24,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162755956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:24,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:24,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:24,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943537773] [2021-07-09 17:27:24,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:24,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:24,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:24,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:24,008 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:24,131 INFO L93 Difference]: Finished difference Result 121 states and 251 transitions. [2021-07-09 17:27:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:24,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:24,132 INFO L225 Difference]: With dead ends: 121 [2021-07-09 17:27:24,132 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 17:27:24,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 17:27:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2021-07-09 17:27:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.1121495327102804) internal successors, (226), 107 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 226 transitions. [2021-07-09 17:27:24,133 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 226 transitions. Word has length 17 [2021-07-09 17:27:24,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:24,133 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 226 transitions. [2021-07-09 17:27:24,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 226 transitions. [2021-07-09 17:27:24,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:24,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:24,134 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:24,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-07-09 17:27:24,334 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:24,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:24,334 INFO L82 PathProgramCache]: Analyzing trace with hash 302344129, now seen corresponding path program 114 times [2021-07-09 17:27:24,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:24,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749617025] [2021-07-09 17:27:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:24,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:24,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749617025] [2021-07-09 17:27:24,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749617025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:24,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709545551] [2021-07-09 17:27:24,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:24,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:27:24,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:24,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:24,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709545551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:24,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:24,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:24,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438340804] [2021-07-09 17:27:24,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:24,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:24,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:24,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:24,566 INFO L87 Difference]: Start difference. First operand 108 states and 226 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:24,759 INFO L93 Difference]: Finished difference Result 172 states and 335 transitions. [2021-07-09 17:27:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:27:24,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:24,760 INFO L225 Difference]: With dead ends: 172 [2021-07-09 17:27:24,760 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:27:24,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:27:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 110. [2021-07-09 17:27:24,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-07-09 17:27:24,761 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-07-09 17:27:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:24,762 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-07-09 17:27:24,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:24,762 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-07-09 17:27:24,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:24,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:24,762 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:24,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:24,962 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:24,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:24,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1797430242, now seen corresponding path program 115 times [2021-07-09 17:27:24,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:24,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77182755] [2021-07-09 17:27:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:25,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:25,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77182755] [2021-07-09 17:27:25,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77182755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:25,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873689417] [2021-07-09 17:27:25,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:25,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:25,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:25,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873689417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:25,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:25,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:25,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728878789] [2021-07-09 17:27:25,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:25,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:25,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:25,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:25,212 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:25,344 INFO L93 Difference]: Finished difference Result 150 states and 297 transitions. [2021-07-09 17:27:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:25,345 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:25,345 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:27:25,345 INFO L226 Difference]: Without dead ends: 144 [2021-07-09 17:27:25,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:25,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-09 17:27:25,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 115. [2021-07-09 17:27:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.175438596491228) internal successors, (248), 114 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:25,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 248 transitions. [2021-07-09 17:27:25,347 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 248 transitions. Word has length 17 [2021-07-09 17:27:25,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:25,347 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 248 transitions. [2021-07-09 17:27:25,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:25,347 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 248 transitions. [2021-07-09 17:27:25,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:25,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:25,347 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:25,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-07-09 17:27:25,547 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:25,548 INFO L82 PathProgramCache]: Analyzing trace with hash -235511449, now seen corresponding path program 116 times [2021-07-09 17:27:25,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:25,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921147288] [2021-07-09 17:27:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:25,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:25,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921147288] [2021-07-09 17:27:25,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921147288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:25,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892247896] [2021-07-09 17:27:25,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:25,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:25,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:25,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:25,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892247896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:25,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:25,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:25,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417952178] [2021-07-09 17:27:25,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:25,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:25,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:25,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:25,791 INFO L87 Difference]: Start difference. First operand 115 states and 248 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:25,886 INFO L93 Difference]: Finished difference Result 129 states and 273 transitions. [2021-07-09 17:27:25,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:27:25,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:25,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:25,886 INFO L225 Difference]: With dead ends: 129 [2021-07-09 17:27:25,886 INFO L226 Difference]: Without dead ends: 129 [2021-07-09 17:27:25,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:25,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-09 17:27:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2021-07-09 17:27:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-07-09 17:27:25,888 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-07-09 17:27:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:25,888 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-07-09 17:27:25,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-07-09 17:27:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:25,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:25,888 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:26,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:26,089 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:26,089 INFO L82 PathProgramCache]: Analyzing trace with hash -860676804, now seen corresponding path program 117 times [2021-07-09 17:27:26,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:26,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709856916] [2021-07-09 17:27:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:26,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:26,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709856916] [2021-07-09 17:27:26,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709856916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:26,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681043746] [2021-07-09 17:27:26,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:26,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:27:26,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:26,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:26,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:26,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681043746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:26,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:26,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:26,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347632012] [2021-07-09 17:27:26,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:26,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:26,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:26,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:26,320 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:26,448 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2021-07-09 17:27:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:27:26,448 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:26,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:26,449 INFO L225 Difference]: With dead ends: 127 [2021-07-09 17:27:26,449 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:27:26,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:27:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2021-07-09 17:27:26,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-07-09 17:27:26,453 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-07-09 17:27:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:26,453 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-07-09 17:27:26,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-07-09 17:27:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:26,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:26,453 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:26,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-07-09 17:27:26,654 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:26,654 INFO L82 PathProgramCache]: Analyzing trace with hash -63941052, now seen corresponding path program 118 times [2021-07-09 17:27:26,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:26,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990075903] [2021-07-09 17:27:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:26,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:26,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990075903] [2021-07-09 17:27:26,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990075903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:26,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338042393] [2021-07-09 17:27:26,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:26,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:26,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:26,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:26,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:26,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338042393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:26,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:26,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:26,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002765289] [2021-07-09 17:27:26,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:26,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:26,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:26,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:26,871 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:26,978 INFO L93 Difference]: Finished difference Result 137 states and 289 transitions. [2021-07-09 17:27:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:26,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:26,979 INFO L225 Difference]: With dead ends: 137 [2021-07-09 17:27:26,979 INFO L226 Difference]: Without dead ends: 137 [2021-07-09 17:27:26,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:26,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-09 17:27:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2021-07-09 17:27:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-07-09 17:27:26,980 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-07-09 17:27:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:26,981 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-07-09 17:27:26,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-07-09 17:27:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:26,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:26,981 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:27,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-07-09 17:27:27,181 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:27,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash 223609183, now seen corresponding path program 119 times [2021-07-09 17:27:27,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:27,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82787636] [2021-07-09 17:27:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:27,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:27,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82787636] [2021-07-09 17:27:27,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82787636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:27,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853724736] [2021-07-09 17:27:27,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:27,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:27:27,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:27,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:27,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:27,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853724736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:27,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:27,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:27,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851872191] [2021-07-09 17:27:27,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:27,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:27,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:27,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:27,481 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:27,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:27,574 INFO L93 Difference]: Finished difference Result 122 states and 259 transitions. [2021-07-09 17:27:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:27:27,574 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:27,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:27,574 INFO L225 Difference]: With dead ends: 122 [2021-07-09 17:27:27,574 INFO L226 Difference]: Without dead ends: 122 [2021-07-09 17:27:27,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 225.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-09 17:27:27,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2021-07-09 17:27:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-07-09 17:27:27,576 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-07-09 17:27:27,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:27,576 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-07-09 17:27:27,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-07-09 17:27:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:27,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:27,576 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:27,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:27,777 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:27,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1569801307, now seen corresponding path program 120 times [2021-07-09 17:27:27,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:27,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135733967] [2021-07-09 17:27:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:27,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:27,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135733967] [2021-07-09 17:27:27,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135733967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:27,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463019144] [2021-07-09 17:27:27,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:27,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:27:27,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:27,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:27,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:27,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463019144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:27,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:27,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:27,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346025289] [2021-07-09 17:27:27,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:27,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:27,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:27,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:27,998 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:28,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:28,211 INFO L93 Difference]: Finished difference Result 147 states and 302 transitions. [2021-07-09 17:27:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:28,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:28,212 INFO L225 Difference]: With dead ends: 147 [2021-07-09 17:27:28,212 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 17:27:28,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:28,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 17:27:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 116. [2021-07-09 17:27:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-07-09 17:27:28,213 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 17 [2021-07-09 17:27:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:28,214 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-07-09 17:27:28,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-07-09 17:27:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:28,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:28,214 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:28,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:28,421 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:28,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:28,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1031945729, now seen corresponding path program 121 times [2021-07-09 17:27:28,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:28,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930348585] [2021-07-09 17:27:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:28,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:28,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930348585] [2021-07-09 17:27:28,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930348585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:28,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043605394] [2021-07-09 17:27:28,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:28,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:28,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:28,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043605394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:28,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:28,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:28,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025781351] [2021-07-09 17:27:28,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:28,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:28,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:28,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:28,646 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:28,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:28,786 INFO L93 Difference]: Finished difference Result 128 states and 269 transitions. [2021-07-09 17:27:28,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:27:28,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:28,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:28,787 INFO L225 Difference]: With dead ends: 128 [2021-07-09 17:27:28,787 INFO L226 Difference]: Without dead ends: 128 [2021-07-09 17:27:28,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-07-09 17:27:28,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-07-09 17:27:28,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-07-09 17:27:28,788 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 17 [2021-07-09 17:27:28,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:28,788 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-07-09 17:27:28,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-07-09 17:27:28,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:28,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:28,789 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:29,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:29,000 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1247924961, now seen corresponding path program 122 times [2021-07-09 17:27:29,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:29,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774344296] [2021-07-09 17:27:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:29,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:29,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774344296] [2021-07-09 17:27:29,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774344296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:29,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393191725] [2021-07-09 17:27:29,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:29,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:29,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:29,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:29,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:29,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393191725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:29,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:29,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:29,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299477680] [2021-07-09 17:27:29,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:29,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:29,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:29,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:29,195 INFO L87 Difference]: Start difference. First operand 112 states and 237 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:29,464 INFO L93 Difference]: Finished difference Result 141 states and 287 transitions. [2021-07-09 17:27:29,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:29,464 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:29,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:29,464 INFO L225 Difference]: With dead ends: 141 [2021-07-09 17:27:29,464 INFO L226 Difference]: Without dead ends: 139 [2021-07-09 17:27:29,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-09 17:27:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2021-07-09 17:27:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-07-09 17:27:29,466 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-07-09 17:27:29,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:29,466 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-07-09 17:27:29,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:29,466 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-07-09 17:27:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:29,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:29,466 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:29,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:29,667 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:29,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:29,667 INFO L82 PathProgramCache]: Analyzing trace with hash 86666369, now seen corresponding path program 123 times [2021-07-09 17:27:29,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:29,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162778535] [2021-07-09 17:27:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:29,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:29,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162778535] [2021-07-09 17:27:29,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162778535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:29,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078047506] [2021-07-09 17:27:29,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:29,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:27:29,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:29,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:29,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:29,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078047506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:29,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:29,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:29,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471867594] [2021-07-09 17:27:29,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:29,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:29,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:29,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:29,873 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:30,185 INFO L93 Difference]: Finished difference Result 147 states and 301 transitions. [2021-07-09 17:27:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:27:30,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:30,186 INFO L225 Difference]: With dead ends: 147 [2021-07-09 17:27:30,186 INFO L226 Difference]: Without dead ends: 147 [2021-07-09 17:27:30,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:30,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-09 17:27:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 117. [2021-07-09 17:27:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-07-09 17:27:30,187 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-07-09 17:27:30,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:30,187 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-07-09 17:27:30,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,187 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-07-09 17:27:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:30,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:30,188 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:30,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-07-09 17:27:30,388 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:30,388 INFO L82 PathProgramCache]: Analyzing trace with hash -451189209, now seen corresponding path program 124 times [2021-07-09 17:27:30,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:30,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195741983] [2021-07-09 17:27:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:30,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:30,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195741983] [2021-07-09 17:27:30,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195741983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:30,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595117030] [2021-07-09 17:27:30,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:30,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:30,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:30,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:30,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:30,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595117030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:30,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:30,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:30,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140158187] [2021-07-09 17:27:30,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:30,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:30,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:30,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:30,583 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:30,829 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-07-09 17:27:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:30,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:30,830 INFO L225 Difference]: With dead ends: 139 [2021-07-09 17:27:30,830 INFO L226 Difference]: Without dead ends: 139 [2021-07-09 17:27:30,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:30,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-09 17:27:30,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2021-07-09 17:27:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-07-09 17:27:30,832 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-07-09 17:27:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:30,832 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-07-09 17:27:30,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-07-09 17:27:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:30,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:30,832 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:31,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:31,032 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:31,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:31,033 INFO L82 PathProgramCache]: Analyzing trace with hash 55157057, now seen corresponding path program 125 times [2021-07-09 17:27:31,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:31,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951342481] [2021-07-09 17:27:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:31,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:31,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951342481] [2021-07-09 17:27:31,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951342481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:31,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316735536] [2021-07-09 17:27:31,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:31,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:27:31,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:31,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:31,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:31,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316735536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:31,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:31,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:27:31,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902042642] [2021-07-09 17:27:31,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:31,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:31,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:31,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:31,232 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:31,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:31,424 INFO L93 Difference]: Finished difference Result 132 states and 276 transitions. [2021-07-09 17:27:31,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:31,425 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:31,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:31,425 INFO L225 Difference]: With dead ends: 132 [2021-07-09 17:27:31,425 INFO L226 Difference]: Without dead ends: 132 [2021-07-09 17:27:31,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-09 17:27:31,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2021-07-09 17:27:31,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-07-09 17:27:31,426 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-07-09 17:27:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:31,427 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-07-09 17:27:31,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-07-09 17:27:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:31,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:31,427 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:31,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-07-09 17:27:31,637 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:31,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:31,637 INFO L82 PathProgramCache]: Analyzing trace with hash -436365568, now seen corresponding path program 126 times [2021-07-09 17:27:31,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:31,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066337864] [2021-07-09 17:27:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:31,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:31,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066337864] [2021-07-09 17:27:31,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066337864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:31,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771550427] [2021-07-09 17:27:31,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:31,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:27:31,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:31,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:31,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:31,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771550427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:31,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:31,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:31,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025765806] [2021-07-09 17:27:31,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:31,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:31,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:31,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:31,859 INFO L87 Difference]: Start difference. First operand 112 states and 236 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:32,016 INFO L93 Difference]: Finished difference Result 126 states and 264 transitions. [2021-07-09 17:27:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:32,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:32,017 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:27:32,017 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 17:27:32,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 221.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:32,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 17:27:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2021-07-09 17:27:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-07-09 17:27:32,018 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-07-09 17:27:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:32,018 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-07-09 17:27:32,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-07-09 17:27:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:32,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:32,019 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:32,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable733,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:32,219 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:32,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:32,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1487766277, now seen corresponding path program 127 times [2021-07-09 17:27:32,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:32,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448645762] [2021-07-09 17:27:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:32,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:32,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448645762] [2021-07-09 17:27:32,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448645762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:32,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27711650] [2021-07-09 17:27:32,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:32,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27711650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:32,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:32,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:32,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313882981] [2021-07-09 17:27:32,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:32,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:32,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:32,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:32,510 INFO L87 Difference]: Start difference. First operand 112 states and 236 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:32,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:32,646 INFO L93 Difference]: Finished difference Result 120 states and 252 transitions. [2021-07-09 17:27:32,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:32,646 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:32,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:32,646 INFO L225 Difference]: With dead ends: 120 [2021-07-09 17:27:32,646 INFO L226 Difference]: Without dead ends: 120 [2021-07-09 17:27:32,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:27:32,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-09 17:27:32,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2021-07-09 17:27:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.128440366972477) internal successors, (232), 109 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 232 transitions. [2021-07-09 17:27:32,648 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 232 transitions. Word has length 17 [2021-07-09 17:27:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:32,648 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 232 transitions. [2021-07-09 17:27:32,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:32,648 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 232 transitions. [2021-07-09 17:27:32,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:32,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:32,648 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:32,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-07-09 17:27:32,858 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1994112543, now seen corresponding path program 128 times [2021-07-09 17:27:32,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:32,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399037157] [2021-07-09 17:27:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:32,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:32,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399037157] [2021-07-09 17:27:32,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399037157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:32,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103195673] [2021-07-09 17:27:32,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:32,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:32,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:32,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:32,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:33,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103195673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:33,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:33,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:33,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584685963] [2021-07-09 17:27:33,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:33,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:33,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:33,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:33,096 INFO L87 Difference]: Start difference. First operand 110 states and 232 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:33,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:33,277 INFO L93 Difference]: Finished difference Result 145 states and 297 transitions. [2021-07-09 17:27:33,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:27:33,277 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:33,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:33,277 INFO L225 Difference]: With dead ends: 145 [2021-07-09 17:27:33,277 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:27:33,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:27:33,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2021-07-09 17:27:33,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.142857142857143) internal successors, (240), 112 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-07-09 17:27:33,279 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 17 [2021-07-09 17:27:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:33,279 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-07-09 17:27:33,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:33,279 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-07-09 17:27:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:33,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:33,280 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:33,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-07-09 17:27:33,489 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:33,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:33,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1456256965, now seen corresponding path program 129 times [2021-07-09 17:27:33,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:33,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740373937] [2021-07-09 17:27:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:33,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:33,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740373937] [2021-07-09 17:27:33,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740373937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:33,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217839855] [2021-07-09 17:27:33,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:33,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:27:33,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:33,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:33,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:33,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217839855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:33,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:33,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:33,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703419812] [2021-07-09 17:27:33,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:33,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:33,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:33,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:33,739 INFO L87 Difference]: Start difference. First operand 113 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:33,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:33,901 INFO L93 Difference]: Finished difference Result 129 states and 270 transitions. [2021-07-09 17:27:33,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:33,901 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:33,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:33,901 INFO L225 Difference]: With dead ends: 129 [2021-07-09 17:27:33,901 INFO L226 Difference]: Without dead ends: 129 [2021-07-09 17:27:33,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-09 17:27:33,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2021-07-09 17:27:33,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-07-09 17:27:33,903 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 17 [2021-07-09 17:27:33,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:33,903 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-07-09 17:27:33,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:33,903 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-07-09 17:27:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:33,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:33,903 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:34,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:34,104 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:34,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:34,104 INFO L82 PathProgramCache]: Analyzing trace with hash -616418488, now seen corresponding path program 130 times [2021-07-09 17:27:34,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:34,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152307953] [2021-07-09 17:27:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:34,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:34,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152307953] [2021-07-09 17:27:34,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152307953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:34,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479376126] [2021-07-09 17:27:34,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:34,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:34,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:34,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:34,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:34,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479376126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:34,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:34,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:34,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541901007] [2021-07-09 17:27:34,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:34,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:34,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:34,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:34,390 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:34,461 INFO L93 Difference]: Finished difference Result 111 states and 234 transitions. [2021-07-09 17:27:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:34,461 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:34,461 INFO L225 Difference]: With dead ends: 111 [2021-07-09 17:27:34,461 INFO L226 Difference]: Without dead ends: 111 [2021-07-09 17:27:34,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:34,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-09 17:27:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2021-07-09 17:27:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-07-09 17:27:34,463 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 17 [2021-07-09 17:27:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:34,463 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-07-09 17:27:34,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:34,463 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-07-09 17:27:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:34,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:34,463 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:34,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:34,680 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:34,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:34,680 INFO L82 PathProgramCache]: Analyzing trace with hash -328868253, now seen corresponding path program 131 times [2021-07-09 17:27:34,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:34,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890288786] [2021-07-09 17:27:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:34,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:34,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890288786] [2021-07-09 17:27:34,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890288786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:34,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072154733] [2021-07-09 17:27:34,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:34,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:27:34,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:34,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:34,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:34,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072154733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:34,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:34,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:34,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252299091] [2021-07-09 17:27:34,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:34,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:34,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:34,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:34,884 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:35,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:35,057 INFO L93 Difference]: Finished difference Result 146 states and 291 transitions. [2021-07-09 17:27:35,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:27:35,057 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:35,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:35,057 INFO L225 Difference]: With dead ends: 146 [2021-07-09 17:27:35,057 INFO L226 Difference]: Without dead ends: 146 [2021-07-09 17:27:35,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:35,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-09 17:27:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-07-09 17:27:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.142857142857143) internal successors, (240), 112 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-07-09 17:27:35,059 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 17 [2021-07-09 17:27:35,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:35,059 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-07-09 17:27:35,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-07-09 17:27:35,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:35,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:35,059 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:35,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-07-09 17:27:35,260 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:35,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:35,260 INFO L82 PathProgramCache]: Analyzing trace with hash -26877973, now seen corresponding path program 132 times [2021-07-09 17:27:35,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:35,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485386866] [2021-07-09 17:27:35,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:35,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:35,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485386866] [2021-07-09 17:27:35,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485386866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:35,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434115836] [2021-07-09 17:27:35,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:35,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:27:35,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:35,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:35,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:35,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434115836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:35,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:35,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:35,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948522712] [2021-07-09 17:27:35,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:35,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:35,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:35,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:35,485 INFO L87 Difference]: Start difference. First operand 113 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:35,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:35,598 INFO L93 Difference]: Finished difference Result 135 states and 282 transitions. [2021-07-09 17:27:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:27:35,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:35,599 INFO L225 Difference]: With dead ends: 135 [2021-07-09 17:27:35,599 INFO L226 Difference]: Without dead ends: 135 [2021-07-09 17:27:35,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:35,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-09 17:27:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-07-09 17:27:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.144144144144144) internal successors, (238), 111 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 238 transitions. [2021-07-09 17:27:35,601 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 238 transitions. Word has length 17 [2021-07-09 17:27:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:35,601 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 238 transitions. [2021-07-09 17:27:35,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:35,601 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 238 transitions. [2021-07-09 17:27:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:35,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:35,601 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:35,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-07-09 17:27:35,801 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:35,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:35,802 INFO L82 PathProgramCache]: Analyzing trace with hash 479468293, now seen corresponding path program 133 times [2021-07-09 17:27:35,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:35,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867922214] [2021-07-09 17:27:35,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:35,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:35,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867922214] [2021-07-09 17:27:35,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867922214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:35,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858886480] [2021-07-09 17:27:35,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:35,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:35,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:36,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858886480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:36,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:36,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:27:36,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494962206] [2021-07-09 17:27:36,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:36,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:36,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:36,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:36,015 INFO L87 Difference]: Start difference. First operand 112 states and 238 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:36,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:36,194 INFO L93 Difference]: Finished difference Result 125 states and 260 transitions. [2021-07-09 17:27:36,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:27:36,194 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:36,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:36,195 INFO L225 Difference]: With dead ends: 125 [2021-07-09 17:27:36,195 INFO L226 Difference]: Without dead ends: 125 [2021-07-09 17:27:36,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:36,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-09 17:27:36,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2021-07-09 17:27:36,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.116504854368932) internal successors, (218), 103 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:36,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 218 transitions. [2021-07-09 17:27:36,196 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 218 transitions. Word has length 17 [2021-07-09 17:27:36,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:36,196 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 218 transitions. [2021-07-09 17:27:36,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:36,196 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 218 transitions. [2021-07-09 17:27:36,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:36,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:36,197 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:36,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-07-09 17:27:36,397 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:36,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:36,397 INFO L82 PathProgramCache]: Analyzing trace with hash 21357727, now seen corresponding path program 134 times [2021-07-09 17:27:36,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:36,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385702663] [2021-07-09 17:27:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:36,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:36,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385702663] [2021-07-09 17:27:36,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385702663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:36,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47569524] [2021-07-09 17:27:36,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:36,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:36,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:36,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:36,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:36,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47569524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:36,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:36,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:36,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9525987] [2021-07-09 17:27:36,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:36,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:36,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:36,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:36,592 INFO L87 Difference]: Start difference. First operand 104 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:36,763 INFO L93 Difference]: Finished difference Result 156 states and 309 transitions. [2021-07-09 17:27:36,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:27:36,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:36,764 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:27:36,764 INFO L226 Difference]: Without dead ends: 154 [2021-07-09 17:27:36,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:27:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-09 17:27:36,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 112. [2021-07-09 17:27:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-07-09 17:27:36,765 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 17 [2021-07-09 17:27:36,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:36,765 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-07-09 17:27:36,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-07-09 17:27:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:36,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:36,766 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:36,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable767,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:36,966 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:36,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:36,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1355949057, now seen corresponding path program 135 times [2021-07-09 17:27:36,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:36,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815195861] [2021-07-09 17:27:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:37,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:37,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815195861] [2021-07-09 17:27:37,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815195861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:37,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458196615] [2021-07-09 17:27:37,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:37,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:27:37,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:37,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:37,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:37,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458196615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:37,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:37,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:37,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979325357] [2021-07-09 17:27:37,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:37,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:37,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:37,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:37,168 INFO L87 Difference]: Start difference. First operand 112 states and 237 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:37,412 INFO L93 Difference]: Finished difference Result 158 states and 315 transitions. [2021-07-09 17:27:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:27:37,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:37,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:37,413 INFO L225 Difference]: With dead ends: 158 [2021-07-09 17:27:37,413 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 17:27:37,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:27:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 17:27:37,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2021-07-09 17:27:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1363636363636362) internal successors, (235), 110 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:37,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 235 transitions. [2021-07-09 17:27:37,414 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 235 transitions. Word has length 17 [2021-07-09 17:27:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:37,415 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 235 transitions. [2021-07-09 17:27:37,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:37,415 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 235 transitions. [2021-07-09 17:27:37,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:37,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:37,415 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:37,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-07-09 17:27:37,616 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:37,616 INFO L82 PathProgramCache]: Analyzing trace with hash 818093479, now seen corresponding path program 136 times [2021-07-09 17:27:37,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:37,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980890217] [2021-07-09 17:27:37,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:37,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:37,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980890217] [2021-07-09 17:27:37,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980890217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:37,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285000409] [2021-07-09 17:27:37,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:37,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:37,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:37,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:37,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:37,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285000409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:37,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:37,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:27:37,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809061281] [2021-07-09 17:27:37,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:27:37,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:37,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:27:37,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:27:37,817 INFO L87 Difference]: Start difference. First operand 111 states and 235 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:37,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:37,963 INFO L93 Difference]: Finished difference Result 157 states and 319 transitions. [2021-07-09 17:27:37,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:37,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:37,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:37,964 INFO L225 Difference]: With dead ends: 157 [2021-07-09 17:27:37,964 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:27:37,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:27:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:27:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2021-07-09 17:27:37,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-07-09 17:27:37,965 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-07-09 17:27:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:37,966 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-07-09 17:27:37,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-07-09 17:27:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:37,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:37,966 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:38,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable778 [2021-07-09 17:27:38,185 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:38,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:38,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1324439745, now seen corresponding path program 137 times [2021-07-09 17:27:38,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:38,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058807579] [2021-07-09 17:27:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:38,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:38,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058807579] [2021-07-09 17:27:38,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058807579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:38,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696167233] [2021-07-09 17:27:38,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:38,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:27:38,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:38,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:27:38,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:38,635 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-09 17:27:38,821 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:27:38,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:27:38,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:38,857 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 17:27:38,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-07-09 17:27:38,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:38,882 INFO L518 ElimStorePlain]: Eliminatee scoreA vanished before elimination [2021-07-09 17:27:38,882 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-07-09 17:27:38,888 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 17:27:38,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-07-09 17:27:38,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:38,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:38,909 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-07-09 17:27:38,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:27:38,925 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 9 variables, input treesize:115, output treesize:50 [2021-07-09 17:27:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:38,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696167233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:38,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:38,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:27:38,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411100785] [2021-07-09 17:27:38,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:27:38,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:38,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:27:38,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:27:38,967 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:39,352 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-07-09 17:27:39,549 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-07-09 17:27:39,761 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-07-09 17:27:40,000 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-07-09 17:27:40,243 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-07-09 17:27:40,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:40,568 INFO L93 Difference]: Finished difference Result 205 states and 400 transitions. [2021-07-09 17:27:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:27:40,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:40,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:40,568 INFO L225 Difference]: With dead ends: 205 [2021-07-09 17:27:40,568 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:27:40,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1842.7ms TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:27:40,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:27:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 109. [2021-07-09 17:27:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.138888888888889) internal successors, (231), 108 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 231 transitions. [2021-07-09 17:27:40,571 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 231 transitions. Word has length 17 [2021-07-09 17:27:40,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:40,571 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 231 transitions. [2021-07-09 17:27:40,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 231 transitions. [2021-07-09 17:27:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:27:40,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:40,572 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:40,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable781 [2021-07-09 17:27:40,772 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:40,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:40,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1767338885, now seen corresponding path program 138 times [2021-07-09 17:27:40,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:40,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922450137] [2021-07-09 17:27:40,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:40,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:40,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922450137] [2021-07-09 17:27:40,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922450137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:40,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733176204] [2021-07-09 17:27:40,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:40,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:27:40,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:40,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:27:40,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:40,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733176204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:40,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:40,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 17:27:40,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465844118] [2021-07-09 17:27:40,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:27:40,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:40,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:27:40,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:27:40,980 INFO L87 Difference]: Start difference. First operand 109 states and 231 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:41,263 INFO L93 Difference]: Finished difference Result 157 states and 318 transitions. [2021-07-09 17:27:41,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:27:41,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:27:41,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:41,264 INFO L225 Difference]: With dead ends: 157 [2021-07-09 17:27:41,264 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:27:41,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 278.5ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:27:41,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 104. [2021-07-09 17:27:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.116504854368932) internal successors, (218), 103 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 218 transitions. [2021-07-09 17:27:41,266 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 218 transitions. Word has length 17 [2021-07-09 17:27:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:41,267 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 218 transitions. [2021-07-09 17:27:41,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:41,267 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 218 transitions. [2021-07-09 17:27:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:27:41,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:41,267 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:41,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:41,467 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:41,468 INFO L82 PathProgramCache]: Analyzing trace with hash 316048736, now seen corresponding path program 139 times [2021-07-09 17:27:41,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:41,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764077039] [2021-07-09 17:27:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:41,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:41,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764077039] [2021-07-09 17:27:41,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764077039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:41,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235109743] [2021-07-09 17:27:41,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:41,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:27:41,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:41,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235109743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:41,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:41,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:27:41,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106153467] [2021-07-09 17:27:41,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:27:41,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:41,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:27:41,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:41,973 INFO L87 Difference]: Start difference. First operand 104 states and 218 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:42,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:42,479 INFO L93 Difference]: Finished difference Result 167 states and 331 transitions. [2021-07-09 17:27:42,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:27:42,480 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:27:42,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:42,480 INFO L225 Difference]: With dead ends: 167 [2021-07-09 17:27:42,480 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:27:42,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 735.8ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:27:42,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:27:42,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 105. [2021-07-09 17:27:42,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.1153846153846154) internal successors, (220), 104 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 220 transitions. [2021-07-09 17:27:42,482 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 220 transitions. Word has length 18 [2021-07-09 17:27:42,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:42,482 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 220 transitions. [2021-07-09 17:27:42,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:42,482 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 220 transitions. [2021-07-09 17:27:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:27:42,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:42,482 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:42,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-07-09 17:27:42,683 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash -37090754, now seen corresponding path program 140 times [2021-07-09 17:27:42,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:42,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703890700] [2021-07-09 17:27:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:43,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:43,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703890700] [2021-07-09 17:27:43,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703890700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:43,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083243735] [2021-07-09 17:27:43,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:43,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:43,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:43,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:27:43,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:43,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083243735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:43,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:43,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:27:43,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789481211] [2021-07-09 17:27:43,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:27:43,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:43,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:27:43,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:43,410 INFO L87 Difference]: Start difference. First operand 105 states and 220 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:43,776 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-07-09 17:27:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:44,241 INFO L93 Difference]: Finished difference Result 166 states and 330 transitions. [2021-07-09 17:27:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:44,241 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:27:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:44,241 INFO L225 Difference]: With dead ends: 166 [2021-07-09 17:27:44,241 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:27:44,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1224.4ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:27:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:27:44,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2021-07-09 17:27:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.1142857142857143) internal successors, (222), 105 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 222 transitions. [2021-07-09 17:27:44,243 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 222 transitions. Word has length 18 [2021-07-09 17:27:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:44,243 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 222 transitions. [2021-07-09 17:27:44,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 222 transitions. [2021-07-09 17:27:44,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:27:44,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:44,243 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:44,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:44,444 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:44,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1690044128, now seen corresponding path program 141 times [2021-07-09 17:27:44,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:44,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864034976] [2021-07-09 17:27:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:44,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:44,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864034976] [2021-07-09 17:27:44,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864034976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:44,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308371258] [2021-07-09 17:27:44,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:44,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:27:44,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:44,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:27:44,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:45,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308371258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:45,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:45,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:27:45,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162364972] [2021-07-09 17:27:45,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:27:45,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:45,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:27:45,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:45,160 INFO L87 Difference]: Start difference. First operand 106 states and 222 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:45,835 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-07-09 17:27:45,987 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-07-09 17:27:46,225 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2021-07-09 17:27:46,372 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-07-09 17:27:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:46,511 INFO L93 Difference]: Finished difference Result 187 states and 361 transitions. [2021-07-09 17:27:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:27:46,511 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:27:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:46,511 INFO L225 Difference]: With dead ends: 187 [2021-07-09 17:27:46,511 INFO L226 Difference]: Without dead ends: 180 [2021-07-09 17:27:46,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1690.9ms TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:27:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-09 17:27:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 107. [2021-07-09 17:27:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 106 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 225 transitions. [2021-07-09 17:27:46,513 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 225 transitions. Word has length 18 [2021-07-09 17:27:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:46,513 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 225 transitions. [2021-07-09 17:27:46,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 225 transitions. [2021-07-09 17:27:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:27:46,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:46,513 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:46,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:46,731 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:46,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1027581438, now seen corresponding path program 142 times [2021-07-09 17:27:46,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:46,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786540582] [2021-07-09 17:27:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:47,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:47,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786540582] [2021-07-09 17:27:47,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786540582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:47,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478959544] [2021-07-09 17:27:47,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:47,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:47,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:47,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:27:47,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:47,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478959544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:47,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:47,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:27:47,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366188019] [2021-07-09 17:27:47,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:27:47,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:27:47,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:47,501 INFO L87 Difference]: Start difference. First operand 107 states and 225 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:48,535 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2021-07-09 17:27:48,775 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 59 [2021-07-09 17:27:49,006 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 74 [2021-07-09 17:27:49,217 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-07-09 17:27:49,395 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 61 [2021-07-09 17:27:49,552 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2021-07-09 17:27:49,697 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 56 [2021-07-09 17:27:49,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:49,713 INFO L93 Difference]: Finished difference Result 207 states and 398 transitions. [2021-07-09 17:27:49,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:27:49,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:27:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:49,714 INFO L225 Difference]: With dead ends: 207 [2021-07-09 17:27:49,714 INFO L226 Difference]: Without dead ends: 181 [2021-07-09 17:27:49,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2565.7ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:27:49,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-07-09 17:27:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 112. [2021-07-09 17:27:49,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-07-09 17:27:49,716 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 18 [2021-07-09 17:27:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:49,716 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-07-09 17:27:49,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-07-09 17:27:49,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:27:49,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:49,716 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:49,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:49,917 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:49,917 INFO L82 PathProgramCache]: Analyzing trace with hash 2075337876, now seen corresponding path program 143 times [2021-07-09 17:27:49,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:49,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411502227] [2021-07-09 17:27:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:50,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:50,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411502227] [2021-07-09 17:27:50,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411502227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:50,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612014135] [2021-07-09 17:27:50,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:50,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:27:50,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:50,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:27:50,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:50,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612014135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:50,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:50,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:27:50,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128420706] [2021-07-09 17:27:50,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:27:50,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:50,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:27:50,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:50,485 INFO L87 Difference]: Start difference. First operand 112 states and 236 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:51,048 INFO L93 Difference]: Finished difference Result 137 states and 274 transitions. [2021-07-09 17:27:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:51,048 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:27:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:51,048 INFO L225 Difference]: With dead ends: 137 [2021-07-09 17:27:51,048 INFO L226 Difference]: Without dead ends: 122 [2021-07-09 17:27:51,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 804.1ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:27:51,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-09 17:27:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2021-07-09 17:27:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-07-09 17:27:51,050 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 18 [2021-07-09 17:27:51,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:51,050 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-07-09 17:27:51,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:51,050 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-07-09 17:27:51,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:27:51,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:51,050 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:51,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-07-09 17:27:51,263 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:51,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:51,263 INFO L82 PathProgramCache]: Analyzing trace with hash 422384502, now seen corresponding path program 144 times [2021-07-09 17:27:51,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:51,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194000498] [2021-07-09 17:27:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:51,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:51,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194000498] [2021-07-09 17:27:51,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194000498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:51,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442066678] [2021-07-09 17:27:51,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:51,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:27:51,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:51,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:27:51,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:51,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442066678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:51,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:51,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:27:51,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128820069] [2021-07-09 17:27:51,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:27:51,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:51,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:27:51,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:51,876 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:52,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:52,559 INFO L93 Difference]: Finished difference Result 142 states and 291 transitions. [2021-07-09 17:27:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:27:52,560 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:27:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:52,560 INFO L225 Difference]: With dead ends: 142 [2021-07-09 17:27:52,560 INFO L226 Difference]: Without dead ends: 129 [2021-07-09 17:27:52,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 934.5ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:27:52,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-09 17:27:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2021-07-09 17:27:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1238938053097347) internal successors, (240), 113 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 240 transitions. [2021-07-09 17:27:52,562 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 240 transitions. Word has length 18 [2021-07-09 17:27:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:52,562 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 240 transitions. [2021-07-09 17:27:52,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 240 transitions. [2021-07-09 17:27:52,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:27:52,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:52,562 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:52,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-07-09 17:27:52,763 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:52,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:52,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1154957228, now seen corresponding path program 145 times [2021-07-09 17:27:52,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:52,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601762689] [2021-07-09 17:27:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:52,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:52,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601762689] [2021-07-09 17:27:52,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601762689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:52,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335100828] [2021-07-09 17:27:52,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:52,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:27:53,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:53,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335100828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:53,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:53,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:27:53,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573577871] [2021-07-09 17:27:53,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:27:53,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:53,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:27:53,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:53,374 INFO L87 Difference]: Start difference. First operand 114 states and 240 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:54,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:54,196 INFO L93 Difference]: Finished difference Result 148 states and 296 transitions. [2021-07-09 17:27:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:27:54,197 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:27:54,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:54,197 INFO L225 Difference]: With dead ends: 148 [2021-07-09 17:27:54,197 INFO L226 Difference]: Without dead ends: 141 [2021-07-09 17:27:54,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1022.0ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:27:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-09 17:27:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2021-07-09 17:27:54,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1315789473684212) internal successors, (243), 114 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 243 transitions. [2021-07-09 17:27:54,199 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 243 transitions. Word has length 18 [2021-07-09 17:27:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:54,199 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 243 transitions. [2021-07-09 17:27:54,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 243 transitions. [2021-07-09 17:27:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:27:54,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:54,199 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:54,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-07-09 17:27:54,400 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:54,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:54,400 INFO L82 PathProgramCache]: Analyzing trace with hash 179634102, now seen corresponding path program 146 times [2021-07-09 17:27:54,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:54,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684111855] [2021-07-09 17:27:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:54,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:54,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684111855] [2021-07-09 17:27:54,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684111855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:54,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028575506] [2021-07-09 17:27:54,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:54,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:54,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:54,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:27:54,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:54,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028575506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:54,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:54,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:27:54,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489663859] [2021-07-09 17:27:54,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:27:54,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:54,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:27:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:27:54,989 INFO L87 Difference]: Start difference. First operand 115 states and 243 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:55,627 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-07-09 17:27:55,816 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-07-09 17:27:56,085 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-07-09 17:27:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:56,773 INFO L93 Difference]: Finished difference Result 249 states and 458 transitions. [2021-07-09 17:27:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:27:56,773 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:27:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:56,774 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:27:56,774 INFO L226 Difference]: Without dead ends: 212 [2021-07-09 17:27:56,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1927.8ms TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:27:56,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-07-09 17:27:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 120. [2021-07-09 17:27:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:56,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-07-09 17:27:56,776 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 18 [2021-07-09 17:27:56,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:56,776 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-07-09 17:27:56,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:56,776 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-07-09 17:27:56,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:27:56,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:56,776 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:56,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable875 [2021-07-09 17:27:56,977 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:56,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1060750436, now seen corresponding path program 147 times [2021-07-09 17:27:56,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:56,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183846195] [2021-07-09 17:27:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:57,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:57,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183846195] [2021-07-09 17:27:57,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183846195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:57,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316117930] [2021-07-09 17:27:57,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:57,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:27:57,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:57,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:27:57,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:57,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316117930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:57,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:57,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:27:57,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868696340] [2021-07-09 17:27:57,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:27:57,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:57,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:27:57,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:57,515 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:57,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:57,879 INFO L93 Difference]: Finished difference Result 146 states and 301 transitions. [2021-07-09 17:27:57,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:27:57,879 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:27:57,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:57,879 INFO L225 Difference]: With dead ends: 146 [2021-07-09 17:27:57,879 INFO L226 Difference]: Without dead ends: 133 [2021-07-09 17:27:57,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 629.1ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:27:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-09 17:27:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2021-07-09 17:27:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.178861788617886) internal successors, (268), 123 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 268 transitions. [2021-07-09 17:27:57,881 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 268 transitions. Word has length 18 [2021-07-09 17:27:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:57,881 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 268 transitions. [2021-07-09 17:27:57,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 268 transitions. [2021-07-09 17:27:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:27:57,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:57,881 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:58,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable888,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:58,082 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:58,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:58,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1656875130, now seen corresponding path program 148 times [2021-07-09 17:27:58,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:58,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510617437] [2021-07-09 17:27:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:58,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:58,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510617437] [2021-07-09 17:27:58,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510617437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:58,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248128021] [2021-07-09 17:27:58,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:58,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:58,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:58,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:27:58,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:58,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248128021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:58,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:58,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:27:58,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736801296] [2021-07-09 17:27:58,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:27:58,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:58,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:27:58,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:27:58,655 INFO L87 Difference]: Start difference. First operand 124 states and 268 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:59,357 INFO L93 Difference]: Finished difference Result 171 states and 342 transitions. [2021-07-09 17:27:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:27:59,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:27:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:59,358 INFO L225 Difference]: With dead ends: 171 [2021-07-09 17:27:59,358 INFO L226 Difference]: Without dead ends: 160 [2021-07-09 17:27:59,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 928.3ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:27:59,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-09 17:27:59,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2021-07-09 17:27:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1774193548387095) internal successors, (270), 124 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:59,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 270 transitions. [2021-07-09 17:27:59,360 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 270 transitions. Word has length 18 [2021-07-09 17:27:59,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:59,360 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 270 transitions. [2021-07-09 17:27:59,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:59,360 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 270 transitions. [2021-07-09 17:27:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:27:59,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:59,360 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:59,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable899 [2021-07-09 17:27:59,561 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:59,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:59,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1303500836, now seen corresponding path program 149 times [2021-07-09 17:27:59,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:59,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771066165] [2021-07-09 17:27:59,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:59,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:59,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771066165] [2021-07-09 17:27:59,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771066165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:59,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711034059] [2021-07-09 17:27:59,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:59,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:27:59,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:59,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:27:59,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:00,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711034059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:00,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:00,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:00,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932867131] [2021-07-09 17:28:00,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:00,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:00,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:00,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:00,079 INFO L87 Difference]: Start difference. First operand 125 states and 270 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:00,931 INFO L93 Difference]: Finished difference Result 224 states and 435 transitions. [2021-07-09 17:28:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:28:00,931 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:00,931 INFO L225 Difference]: With dead ends: 224 [2021-07-09 17:28:00,932 INFO L226 Difference]: Without dead ends: 198 [2021-07-09 17:28:00,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 993.6ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:28:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-07-09 17:28:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 128. [2021-07-09 17:28:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.173228346456693) internal successors, (276), 127 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 276 transitions. [2021-07-09 17:28:00,933 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 276 transitions. Word has length 18 [2021-07-09 17:28:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:00,933 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 276 transitions. [2021-07-09 17:28:00,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 276 transitions. [2021-07-09 17:28:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:00,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:00,934 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:01,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-07-09 17:28:01,134 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:01,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2131745900, now seen corresponding path program 150 times [2021-07-09 17:28:01,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:01,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99785336] [2021-07-09 17:28:01,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:01,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:01,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99785336] [2021-07-09 17:28:01,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99785336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:01,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603788500] [2021-07-09 17:28:01,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:01,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:28:01,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:01,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:28:01,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:01,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603788500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:01,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:01,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:01,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141812872] [2021-07-09 17:28:01,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:01,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:01,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:01,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:01,677 INFO L87 Difference]: Start difference. First operand 128 states and 276 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:02,709 INFO L93 Difference]: Finished difference Result 225 states and 449 transitions. [2021-07-09 17:28:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:28:02,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:02,710 INFO L225 Difference]: With dead ends: 225 [2021-07-09 17:28:02,710 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:28:02,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1189.7ms TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:28:02,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:28:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 135. [2021-07-09 17:28:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1940298507462686) internal successors, (294), 134 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 294 transitions. [2021-07-09 17:28:02,712 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 294 transitions. Word has length 18 [2021-07-09 17:28:02,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:02,712 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 294 transitions. [2021-07-09 17:28:02,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 294 transitions. [2021-07-09 17:28:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:02,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:02,713 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:02,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:02,913 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:02,914 INFO L82 PathProgramCache]: Analyzing trace with hash -797154570, now seen corresponding path program 151 times [2021-07-09 17:28:02,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:02,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643808383] [2021-07-09 17:28:02,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:03,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643808383] [2021-07-09 17:28:03,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643808383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840642923] [2021-07-09 17:28:03,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:03,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:03,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:03,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840642923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:03,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:03,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:03,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072968945] [2021-07-09 17:28:03,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:03,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:03,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:03,418 INFO L87 Difference]: Start difference. First operand 135 states and 294 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:03,865 INFO L93 Difference]: Finished difference Result 198 states and 397 transitions. [2021-07-09 17:28:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:03,865 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:03,865 INFO L225 Difference]: With dead ends: 198 [2021-07-09 17:28:03,865 INFO L226 Difference]: Without dead ends: 179 [2021-07-09 17:28:03,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 628.9ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:28:03,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-09 17:28:03,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2021-07-09 17:28:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.2058823529411766) internal successors, (300), 136 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 300 transitions. [2021-07-09 17:28:03,867 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 300 transitions. Word has length 18 [2021-07-09 17:28:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:03,867 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 300 transitions. [2021-07-09 17:28:03,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 300 transitions. [2021-07-09 17:28:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:03,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:03,868 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:04,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable935 [2021-07-09 17:28:04,068 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:04,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1335010148, now seen corresponding path program 152 times [2021-07-09 17:28:04,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:04,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577841324] [2021-07-09 17:28:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:04,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:04,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577841324] [2021-07-09 17:28:04,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577841324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:04,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481036295] [2021-07-09 17:28:04,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:04,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:04,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:04,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:04,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:04,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481036295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:04,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:04,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:04,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564685413] [2021-07-09 17:28:04,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:04,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:04,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:04,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:04,628 INFO L87 Difference]: Start difference. First operand 137 states and 300 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:04,998 INFO L93 Difference]: Finished difference Result 206 states and 421 transitions. [2021-07-09 17:28:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:04,999 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:04,999 INFO L225 Difference]: With dead ends: 206 [2021-07-09 17:28:04,999 INFO L226 Difference]: Without dead ends: 187 [2021-07-09 17:28:04,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 632.7ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:28:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-09 17:28:05,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2021-07-09 17:28:05,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.210144927536232) internal successors, (305), 138 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 305 transitions. [2021-07-09 17:28:05,001 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 305 transitions. Word has length 18 [2021-07-09 17:28:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:05,001 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 305 transitions. [2021-07-09 17:28:05,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 305 transitions. [2021-07-09 17:28:05,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:05,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:05,002 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:05,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:05,205 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:05,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:05,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1158851330, now seen corresponding path program 153 times [2021-07-09 17:28:05,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:05,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802721485] [2021-07-09 17:28:05,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:05,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:05,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802721485] [2021-07-09 17:28:05,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802721485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:05,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568332922] [2021-07-09 17:28:05,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:05,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:05,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:05,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:28:05,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:05,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568332922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:05,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:05,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:28:05,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709061548] [2021-07-09 17:28:05,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:28:05,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:05,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:28:05,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:28:05,865 INFO L87 Difference]: Start difference. First operand 139 states and 305 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:06,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:06,382 INFO L93 Difference]: Finished difference Result 172 states and 355 transitions. [2021-07-09 17:28:06,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:28:06,383 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:06,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:06,383 INFO L225 Difference]: With dead ends: 172 [2021-07-09 17:28:06,383 INFO L226 Difference]: Without dead ends: 165 [2021-07-09 17:28:06,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 891.2ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:28:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-09 17:28:06,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2021-07-09 17:28:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.2056737588652484) internal successors, (311), 141 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 311 transitions. [2021-07-09 17:28:06,385 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 311 transitions. Word has length 18 [2021-07-09 17:28:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:06,385 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 311 transitions. [2021-07-09 17:28:06,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 311 transitions. [2021-07-09 17:28:06,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:06,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:06,385 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:06,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-07-09 17:28:06,586 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:06,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:06,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1483162592, now seen corresponding path program 154 times [2021-07-09 17:28:06,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:06,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486843244] [2021-07-09 17:28:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:06,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:06,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486843244] [2021-07-09 17:28:06,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486843244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:06,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049288937] [2021-07-09 17:28:06,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:06,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:06,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:06,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:28:06,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:07,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049288937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:07,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:07,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:28:07,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306159012] [2021-07-09 17:28:07,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:28:07,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:07,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:28:07,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:28:07,166 INFO L87 Difference]: Start difference. First operand 142 states and 311 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:07,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:07,942 INFO L93 Difference]: Finished difference Result 179 states and 367 transitions. [2021-07-09 17:28:07,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:28:07,942 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:07,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:07,943 INFO L225 Difference]: With dead ends: 179 [2021-07-09 17:28:07,943 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:28:07,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1032.9ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:28:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:28:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 143. [2021-07-09 17:28:07,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.211267605633803) internal successors, (314), 142 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 314 transitions. [2021-07-09 17:28:07,945 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 314 transitions. Word has length 18 [2021-07-09 17:28:07,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:07,945 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 314 transitions. [2021-07-09 17:28:07,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 314 transitions. [2021-07-09 17:28:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:07,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:07,945 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:08,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable973 [2021-07-09 17:28:08,162 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:08,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:08,162 INFO L82 PathProgramCache]: Analyzing trace with hash -94179138, now seen corresponding path program 155 times [2021-07-09 17:28:08,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:08,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710891521] [2021-07-09 17:28:08,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:08,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:08,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710891521] [2021-07-09 17:28:08,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710891521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:08,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962883758] [2021-07-09 17:28:08,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:08,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:28:08,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:08,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:08,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:08,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962883758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:08,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:08,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:28:08,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657992455] [2021-07-09 17:28:08,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:28:08,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:08,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:28:08,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:28:08,842 INFO L87 Difference]: Start difference. First operand 143 states and 314 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:09,814 INFO L93 Difference]: Finished difference Result 193 states and 393 transitions. [2021-07-09 17:28:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:28:09,814 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:09,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:09,815 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:28:09,815 INFO L226 Difference]: Without dead ends: 167 [2021-07-09 17:28:09,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1226.3ms TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:28:09,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-09 17:28:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 143. [2021-07-09 17:28:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.2183098591549295) internal successors, (315), 142 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:09,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 315 transitions. [2021-07-09 17:28:09,817 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 315 transitions. Word has length 18 [2021-07-09 17:28:09,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:09,817 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 315 transitions. [2021-07-09 17:28:09,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 315 transitions. [2021-07-09 17:28:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:09,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:09,817 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:10,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:10,034 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:10,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:10,034 INFO L82 PathProgramCache]: Analyzing trace with hash -242722746, now seen corresponding path program 156 times [2021-07-09 17:28:10,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:10,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996499416] [2021-07-09 17:28:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:10,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:10,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996499416] [2021-07-09 17:28:10,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996499416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:10,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498484837] [2021-07-09 17:28:10,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:10,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:28:10,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:10,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:10,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:10,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498484837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:10,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:10,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:10,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691826964] [2021-07-09 17:28:10,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:10,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:10,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:10,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:10,547 INFO L87 Difference]: Start difference. First operand 143 states and 315 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:11,332 INFO L93 Difference]: Finished difference Result 237 states and 471 transitions. [2021-07-09 17:28:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:28:11,333 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:11,333 INFO L225 Difference]: With dead ends: 237 [2021-07-09 17:28:11,333 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:28:11,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 914.3ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:28:11,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:28:11,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 141. [2021-07-09 17:28:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.2214285714285715) internal successors, (311), 140 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 311 transitions. [2021-07-09 17:28:11,335 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 311 transitions. Word has length 18 [2021-07-09 17:28:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:11,335 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 311 transitions. [2021-07-09 17:28:11,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 311 transitions. [2021-07-09 17:28:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:11,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:11,335 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:11,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-07-09 17:28:11,548 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:11,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:11,549 INFO L82 PathProgramCache]: Analyzing trace with hash -863772573, now seen corresponding path program 157 times [2021-07-09 17:28:11,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:11,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687902542] [2021-07-09 17:28:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:28:11,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:11,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687902542] [2021-07-09 17:28:11,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687902542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:11,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327900013] [2021-07-09 17:28:11,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:11,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:11,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:28:11,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327900013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:11,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:11,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:28:11,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397550095] [2021-07-09 17:28:11,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:28:11,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:11,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:28:11,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:28:11,768 INFO L87 Difference]: Start difference. First operand 141 states and 311 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:11,880 INFO L93 Difference]: Finished difference Result 164 states and 354 transitions. [2021-07-09 17:28:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:28:11,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:11,881 INFO L225 Difference]: With dead ends: 164 [2021-07-09 17:28:11,881 INFO L226 Difference]: Without dead ends: 164 [2021-07-09 17:28:11,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:28:11,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-07-09 17:28:11,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2021-07-09 17:28:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.2142857142857144) internal successors, (310), 140 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 310 transitions. [2021-07-09 17:28:11,883 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 310 transitions. Word has length 18 [2021-07-09 17:28:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:11,883 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 310 transitions. [2021-07-09 17:28:11,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 310 transitions. [2021-07-09 17:28:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:11,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:11,883 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:12,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:12,093 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:12,093 INFO L82 PathProgramCache]: Analyzing trace with hash 263623520, now seen corresponding path program 158 times [2021-07-09 17:28:12,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:12,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745888775] [2021-07-09 17:28:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:12,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:12,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745888775] [2021-07-09 17:28:12,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745888775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:12,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998955308] [2021-07-09 17:28:12,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:12,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:12,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:12,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:12,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:12,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998955308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:12,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:12,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:12,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172007782] [2021-07-09 17:28:12,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:12,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:12,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:12,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:12,602 INFO L87 Difference]: Start difference. First operand 141 states and 310 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:13,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:13,077 INFO L93 Difference]: Finished difference Result 205 states and 413 transitions. [2021-07-09 17:28:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:28:13,077 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:13,077 INFO L225 Difference]: With dead ends: 205 [2021-07-09 17:28:13,077 INFO L226 Difference]: Without dead ends: 186 [2021-07-09 17:28:13,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 657.1ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:28:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-09 17:28:13,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 137. [2021-07-09 17:28:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.198529411764706) internal successors, (299), 136 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:13,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2021-07-09 17:28:13,079 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 18 [2021-07-09 17:28:13,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:13,079 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2021-07-09 17:28:13,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2021-07-09 17:28:13,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:13,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:13,080 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:13,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-07-09 17:28:13,280 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:13,281 INFO L82 PathProgramCache]: Analyzing trace with hash -274232058, now seen corresponding path program 159 times [2021-07-09 17:28:13,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:13,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654194930] [2021-07-09 17:28:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:13,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:13,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654194930] [2021-07-09 17:28:13,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654194930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:13,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206932085] [2021-07-09 17:28:13,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:13,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:28:13,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:13,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:28:13,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:13,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206932085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:13,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:13,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:13,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749550620] [2021-07-09 17:28:13,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:13,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:13,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:13,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:13,841 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:14,439 INFO L93 Difference]: Finished difference Result 209 states and 427 transitions. [2021-07-09 17:28:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:28:14,439 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:14,440 INFO L225 Difference]: With dead ends: 209 [2021-07-09 17:28:14,440 INFO L226 Difference]: Without dead ends: 190 [2021-07-09 17:28:14,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 776.4ms TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:28:14,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-09 17:28:14,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 135. [2021-07-09 17:28:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.201492537313433) internal successors, (295), 134 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:14,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 295 transitions. [2021-07-09 17:28:14,441 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 295 transitions. Word has length 18 [2021-07-09 17:28:14,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:14,441 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 295 transitions. [2021-07-09 17:28:14,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:14,442 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 295 transitions. [2021-07-09 17:28:14,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:14,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:14,442 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:14,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:14,642 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:14,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1267484832, now seen corresponding path program 160 times [2021-07-09 17:28:14,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:14,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96551183] [2021-07-09 17:28:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:14,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:14,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96551183] [2021-07-09 17:28:14,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96551183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:14,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725679146] [2021-07-09 17:28:14,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:14,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:14,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:14,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:28:14,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:15,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725679146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:15,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:15,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:15,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32947532] [2021-07-09 17:28:15,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:15,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:15,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:15,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:15,207 INFO L87 Difference]: Start difference. First operand 135 states and 295 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:15,625 INFO L93 Difference]: Finished difference Result 168 states and 346 transitions. [2021-07-09 17:28:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:28:15,625 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:15,626 INFO L225 Difference]: With dead ends: 168 [2021-07-09 17:28:15,626 INFO L226 Difference]: Without dead ends: 161 [2021-07-09 17:28:15,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 666.9ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:28:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-09 17:28:15,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2021-07-09 17:28:15,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.204379562043796) internal successors, (302), 137 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 302 transitions. [2021-07-09 17:28:15,628 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 302 transitions. Word has length 18 [2021-07-09 17:28:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:15,628 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 302 transitions. [2021-07-09 17:28:15,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:15,628 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 302 transitions. [2021-07-09 17:28:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:15,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:15,628 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:15,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1040,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:15,829 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:15,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:15,829 INFO L82 PathProgramCache]: Analyzing trace with hash -309856898, now seen corresponding path program 161 times [2021-07-09 17:28:15,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:15,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954687520] [2021-07-09 17:28:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:16,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:16,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954687520] [2021-07-09 17:28:16,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954687520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:16,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783964544] [2021-07-09 17:28:16,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:16,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:28:16,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:16,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:16,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:16,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783964544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:16,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:16,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:16,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63203473] [2021-07-09 17:28:16,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:16,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:16,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:16,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:16,415 INFO L87 Difference]: Start difference. First operand 138 states and 302 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:17,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:17,559 INFO L93 Difference]: Finished difference Result 214 states and 430 transitions. [2021-07-09 17:28:17,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:28:17,559 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:17,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:17,560 INFO L225 Difference]: With dead ends: 214 [2021-07-09 17:28:17,560 INFO L226 Difference]: Without dead ends: 190 [2021-07-09 17:28:17,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1337.8ms TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:28:17,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-09 17:28:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2021-07-09 17:28:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.2253521126760565) internal successors, (316), 142 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 316 transitions. [2021-07-09 17:28:17,562 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 316 transitions. Word has length 18 [2021-07-09 17:28:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:17,562 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 316 transitions. [2021-07-09 17:28:17,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 316 transitions. [2021-07-09 17:28:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:17,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:17,562 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:17,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:17,777 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:17,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:17,777 INFO L82 PathProgramCache]: Analyzing trace with hash 196489368, now seen corresponding path program 162 times [2021-07-09 17:28:17,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:17,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108101684] [2021-07-09 17:28:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:17,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:17,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108101684] [2021-07-09 17:28:17,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108101684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:17,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364688922] [2021-07-09 17:28:17,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:17,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:28:17,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:17,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:17,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:18,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364688922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:18,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:18,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:18,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200924063] [2021-07-09 17:28:18,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:18,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:18,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:18,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:18,300 INFO L87 Difference]: Start difference. First operand 143 states and 316 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:19,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:19,005 INFO L93 Difference]: Finished difference Result 203 states and 416 transitions. [2021-07-09 17:28:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:28:19,006 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:19,006 INFO L225 Difference]: With dead ends: 203 [2021-07-09 17:28:19,006 INFO L226 Difference]: Without dead ends: 174 [2021-07-09 17:28:19,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 918.1ms TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:28:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-09 17:28:19,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 144. [2021-07-09 17:28:19,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2237762237762237) internal successors, (318), 143 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:19,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 318 transitions. [2021-07-09 17:28:19,008 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 318 transitions. Word has length 18 [2021-07-09 17:28:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:19,008 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 318 transitions. [2021-07-09 17:28:19,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 318 transitions. [2021-07-09 17:28:19,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:19,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:19,008 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:19,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:19,209 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:19,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:19,209 INFO L82 PathProgramCache]: Analyzing trace with hash 993225120, now seen corresponding path program 163 times [2021-07-09 17:28:19,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:19,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079878196] [2021-07-09 17:28:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:19,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:19,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079878196] [2021-07-09 17:28:19,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079878196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:19,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619687112] [2021-07-09 17:28:19,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:19,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:28:19,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:19,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619687112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:19,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:19,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:19,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758117443] [2021-07-09 17:28:19,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:19,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:19,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:19,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:19,638 INFO L87 Difference]: Start difference. First operand 144 states and 318 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:20,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:20,105 INFO L93 Difference]: Finished difference Result 212 states and 438 transitions. [2021-07-09 17:28:20,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:20,105 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:20,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:20,106 INFO L225 Difference]: With dead ends: 212 [2021-07-09 17:28:20,106 INFO L226 Difference]: Without dead ends: 193 [2021-07-09 17:28:20,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 593.3ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:28:20,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-09 17:28:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2021-07-09 17:28:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2237762237762237) internal successors, (318), 143 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 318 transitions. [2021-07-09 17:28:20,108 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 318 transitions. Word has length 18 [2021-07-09 17:28:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:20,108 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 318 transitions. [2021-07-09 17:28:20,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:20,108 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 318 transitions. [2021-07-09 17:28:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:20,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:20,108 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:20,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1075 [2021-07-09 17:28:20,309 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:20,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:20,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1286645570, now seen corresponding path program 164 times [2021-07-09 17:28:20,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:20,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048514155] [2021-07-09 17:28:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:20,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:20,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048514155] [2021-07-09 17:28:20,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048514155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:20,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810836583] [2021-07-09 17:28:20,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:20,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:20,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:20,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:20,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:20,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810836583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:20,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:20,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:20,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644530730] [2021-07-09 17:28:20,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:20,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:20,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:20,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:20,865 INFO L87 Difference]: Start difference. First operand 144 states and 318 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:21,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:21,359 INFO L93 Difference]: Finished difference Result 190 states and 394 transitions. [2021-07-09 17:28:21,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:21,359 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:21,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:21,359 INFO L225 Difference]: With dead ends: 190 [2021-07-09 17:28:21,359 INFO L226 Difference]: Without dead ends: 172 [2021-07-09 17:28:21,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 745.6ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:28:21,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-09 17:28:21,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 146. [2021-07-09 17:28:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.220689655172414) internal successors, (322), 145 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:21,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 322 transitions. [2021-07-09 17:28:21,361 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 322 transitions. Word has length 18 [2021-07-09 17:28:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:21,361 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 322 transitions. [2021-07-09 17:28:21,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:21,361 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 322 transitions. [2021-07-09 17:28:21,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:21,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:21,362 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:21,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:21,562 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:21,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:21,562 INFO L82 PathProgramCache]: Analyzing trace with hash -489909818, now seen corresponding path program 165 times [2021-07-09 17:28:21,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:21,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237064381] [2021-07-09 17:28:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:21,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:21,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237064381] [2021-07-09 17:28:21,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237064381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:21,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058855645] [2021-07-09 17:28:21,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:21,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:21,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:21,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:21,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:22,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058855645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:22,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:22,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:22,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625538003] [2021-07-09 17:28:22,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:22,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:22,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:22,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:22,091 INFO L87 Difference]: Start difference. First operand 146 states and 322 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:22,805 INFO L93 Difference]: Finished difference Result 217 states and 437 transitions. [2021-07-09 17:28:22,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:22,806 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:22,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:22,806 INFO L225 Difference]: With dead ends: 217 [2021-07-09 17:28:22,806 INFO L226 Difference]: Without dead ends: 188 [2021-07-09 17:28:22,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 932.1ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:28:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-09 17:28:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 149. [2021-07-09 17:28:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.22972972972973) internal successors, (330), 148 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 330 transitions. [2021-07-09 17:28:22,808 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 330 transitions. Word has length 18 [2021-07-09 17:28:22,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:22,808 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 330 transitions. [2021-07-09 17:28:22,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 330 transitions. [2021-07-09 17:28:22,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:22,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:22,808 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:23,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:23,013 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:23,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:23,014 INFO L82 PathProgramCache]: Analyzing trace with hash 16436448, now seen corresponding path program 166 times [2021-07-09 17:28:23,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:23,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154336685] [2021-07-09 17:28:23,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:23,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:23,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154336685] [2021-07-09 17:28:23,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154336685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:23,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884358843] [2021-07-09 17:28:23,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:23,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:23,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:23,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884358843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:23,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:23,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:23,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380094288] [2021-07-09 17:28:23,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:23,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:23,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:23,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:23,613 INFO L87 Difference]: Start difference. First operand 149 states and 330 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:24,078 INFO L93 Difference]: Finished difference Result 219 states and 454 transitions. [2021-07-09 17:28:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:24,079 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:28:24,079 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:28:24,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 722.1ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:28:24,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:28:24,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2021-07-09 17:28:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2348993288590604) internal successors, (333), 149 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 333 transitions. [2021-07-09 17:28:24,081 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 333 transitions. Word has length 18 [2021-07-09 17:28:24,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:24,081 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 333 transitions. [2021-07-09 17:28:24,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:24,081 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 333 transitions. [2021-07-09 17:28:24,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:24,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:24,081 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:24,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1108 [2021-07-09 17:28:24,281 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:24,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:24,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1660498388, now seen corresponding path program 167 times [2021-07-09 17:28:24,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:24,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974630110] [2021-07-09 17:28:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:24,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974630110] [2021-07-09 17:28:24,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974630110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084346953] [2021-07-09 17:28:24,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:24,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:28:24,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:24,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:24,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:24,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084346953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:24,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:24,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:28:24,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187550798] [2021-07-09 17:28:24,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:28:24,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:24,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:28:24,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:28:24,805 INFO L87 Difference]: Start difference. First operand 150 states and 333 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:25,320 INFO L93 Difference]: Finished difference Result 170 states and 363 transitions. [2021-07-09 17:28:25,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:28:25,321 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:25,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:25,325 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:28:25,325 INFO L226 Difference]: Without dead ends: 155 [2021-07-09 17:28:25,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 787.8ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:28:25,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-09 17:28:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2021-07-09 17:28:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2317880794701987) internal successors, (337), 151 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 337 transitions. [2021-07-09 17:28:25,327 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 337 transitions. Word has length 18 [2021-07-09 17:28:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:25,327 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 337 transitions. [2021-07-09 17:28:25,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 337 transitions. [2021-07-09 17:28:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:25,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:25,327 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:25,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1120,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:25,528 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:25,528 INFO L82 PathProgramCache]: Analyzing trace with hash 7545014, now seen corresponding path program 168 times [2021-07-09 17:28:25,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:25,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492884422] [2021-07-09 17:28:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:25,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:25,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492884422] [2021-07-09 17:28:25,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492884422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:25,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523503035] [2021-07-09 17:28:25,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:25,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:28:25,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:25,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:25,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:26,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523503035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:26,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:26,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:28:26,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731918900] [2021-07-09 17:28:26,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:28:26,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:26,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:28:26,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:28:26,139 INFO L87 Difference]: Start difference. First operand 152 states and 337 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:26,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:26,620 INFO L93 Difference]: Finished difference Result 169 states and 362 transitions. [2021-07-09 17:28:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:28:26,620 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:26,621 INFO L225 Difference]: With dead ends: 169 [2021-07-09 17:28:26,621 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:28:26,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 823.5ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:28:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:28:26,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2021-07-09 17:28:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2302631578947367) internal successors, (339), 152 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 339 transitions. [2021-07-09 17:28:26,622 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 339 transitions. Word has length 18 [2021-07-09 17:28:26,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:26,623 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 339 transitions. [2021-07-09 17:28:26,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 339 transitions. [2021-07-09 17:28:26,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:26,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:26,623 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:26,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:26,823 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:26,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:26,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1569796716, now seen corresponding path program 169 times [2021-07-09 17:28:26,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:26,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642940775] [2021-07-09 17:28:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:27,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:27,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642940775] [2021-07-09 17:28:27,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642940775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:27,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232093081] [2021-07-09 17:28:27,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:27,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:28:27,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:27,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232093081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:27,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:27,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:28:27,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210621212] [2021-07-09 17:28:27,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:28:27,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:27,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:28:27,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:28:27,455 INFO L87 Difference]: Start difference. First operand 153 states and 339 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:28,828 INFO L93 Difference]: Finished difference Result 226 states and 453 transitions. [2021-07-09 17:28:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:28:28,828 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:28,829 INFO L225 Difference]: With dead ends: 226 [2021-07-09 17:28:28,829 INFO L226 Difference]: Without dead ends: 201 [2021-07-09 17:28:28,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1657.8ms TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:28:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-07-09 17:28:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2021-07-09 17:28:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2317880794701987) internal successors, (337), 151 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 337 transitions. [2021-07-09 17:28:28,831 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 337 transitions. Word has length 18 [2021-07-09 17:28:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:28,831 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 337 transitions. [2021-07-09 17:28:28,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 337 transitions. [2021-07-09 17:28:28,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:28,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:28,831 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:29,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:29,032 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:29,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1475589924, now seen corresponding path program 170 times [2021-07-09 17:28:29,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:29,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310943055] [2021-07-09 17:28:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:29,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310943055] [2021-07-09 17:28:29,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310943055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945276553] [2021-07-09 17:28:29,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:29,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:29,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:29,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:29,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945276553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:29,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:29,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:29,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972341111] [2021-07-09 17:28:29,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:29,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:29,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:29,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:29,592 INFO L87 Difference]: Start difference. First operand 152 states and 337 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:29,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:29,890 INFO L93 Difference]: Finished difference Result 170 states and 364 transitions. [2021-07-09 17:28:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:28:29,891 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:29,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:29,891 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:28:29,891 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 17:28:29,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 607.8ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 17:28:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-07-09 17:28:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2287581699346406) internal successors, (341), 153 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 341 transitions. [2021-07-09 17:28:29,893 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 341 transitions. Word has length 18 [2021-07-09 17:28:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:29,893 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 341 transitions. [2021-07-09 17:28:29,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:29,893 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 341 transitions. [2021-07-09 17:28:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:29,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:29,893 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:30,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1152,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:30,094 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:30,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:30,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1242035642, now seen corresponding path program 171 times [2021-07-09 17:28:30,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:30,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364703581] [2021-07-09 17:28:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:30,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:30,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364703581] [2021-07-09 17:28:30,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364703581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:30,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730587561] [2021-07-09 17:28:30,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:30,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:30,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:28:30,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:30,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730587561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:30,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:30,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:30,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657756409] [2021-07-09 17:28:30,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:30,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:30,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:30,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:30,678 INFO L87 Difference]: Start difference. First operand 154 states and 341 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:31,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:31,552 INFO L93 Difference]: Finished difference Result 202 states and 418 transitions. [2021-07-09 17:28:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:28:31,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:31,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:31,553 INFO L225 Difference]: With dead ends: 202 [2021-07-09 17:28:31,553 INFO L226 Difference]: Without dead ends: 181 [2021-07-09 17:28:31,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1073.3ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:28:31,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-07-09 17:28:31,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-07-09 17:28:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2337662337662336) internal successors, (344), 154 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 344 transitions. [2021-07-09 17:28:31,555 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 344 transitions. Word has length 18 [2021-07-09 17:28:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:31,555 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 344 transitions. [2021-07-09 17:28:31,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 344 transitions. [2021-07-09 17:28:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:31,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:31,556 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:31,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:31,756 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:31,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:31,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1955577145, now seen corresponding path program 172 times [2021-07-09 17:28:31,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:31,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091862792] [2021-07-09 17:28:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:28:31,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:31,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091862792] [2021-07-09 17:28:31,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091862792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:31,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141589416] [2021-07-09 17:28:31,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:31,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:31,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:31,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:31,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:28:31,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141589416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:31,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:31,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:28:31,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550202974] [2021-07-09 17:28:31,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:28:31,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:31,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:28:31,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:28:31,964 INFO L87 Difference]: Start difference. First operand 155 states and 344 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:32,245 INFO L93 Difference]: Finished difference Result 186 states and 405 transitions. [2021-07-09 17:28:32,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:28:32,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:32,246 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:28:32,246 INFO L226 Difference]: Without dead ends: 186 [2021-07-09 17:28:32,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 310.3ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:28:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-09 17:28:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2021-07-09 17:28:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2337662337662336) internal successors, (344), 154 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 344 transitions. [2021-07-09 17:28:32,248 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 344 transitions. Word has length 18 [2021-07-09 17:28:32,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:32,248 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 344 transitions. [2021-07-09 17:28:32,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:32,248 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 344 transitions. [2021-07-09 17:28:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:32,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:32,248 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:32,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-07-09 17:28:32,449 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:32,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1748381908, now seen corresponding path program 173 times [2021-07-09 17:28:32,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:32,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727352770] [2021-07-09 17:28:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:32,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:32,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727352770] [2021-07-09 17:28:32,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727352770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:32,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373117249] [2021-07-09 17:28:32,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:32,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:28:32,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:32,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:32,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:32,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373117249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:32,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:32,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:32,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338909048] [2021-07-09 17:28:32,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:32,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:32,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:32,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:32,944 INFO L87 Difference]: Start difference. First operand 155 states and 344 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:33,594 INFO L93 Difference]: Finished difference Result 212 states and 446 transitions. [2021-07-09 17:28:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:33,595 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:33,595 INFO L225 Difference]: With dead ends: 212 [2021-07-09 17:28:33,595 INFO L226 Difference]: Without dead ends: 192 [2021-07-09 17:28:33,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 768.8ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:28:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-07-09 17:28:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 157. [2021-07-09 17:28:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.230769230769231) internal successors, (348), 156 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 348 transitions. [2021-07-09 17:28:33,598 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 348 transitions. Word has length 18 [2021-07-09 17:28:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:33,598 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 348 transitions. [2021-07-09 17:28:33,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 348 transitions. [2021-07-09 17:28:33,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:33,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:33,598 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:33,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1181,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:33,799 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:33,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:33,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1211994058, now seen corresponding path program 174 times [2021-07-09 17:28:33,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:33,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201156884] [2021-07-09 17:28:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:33,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:33,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201156884] [2021-07-09 17:28:33,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201156884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:33,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093078813] [2021-07-09 17:28:33,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:33,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:28:33,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:33,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:28:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:34,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093078813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:34,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:34,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:34,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527586128] [2021-07-09 17:28:34,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:34,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:34,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:34,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:34,267 INFO L87 Difference]: Start difference. First operand 157 states and 348 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:34,931 INFO L93 Difference]: Finished difference Result 221 states and 456 transitions. [2021-07-09 17:28:34,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:28:34,931 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:34,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:34,932 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:28:34,932 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:28:34,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 819.7ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:28:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:28:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 159. [2021-07-09 17:28:34,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2341772151898733) internal successors, (353), 158 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 353 transitions. [2021-07-09 17:28:34,934 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 353 transitions. Word has length 18 [2021-07-09 17:28:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:34,934 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 353 transitions. [2021-07-09 17:28:34,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 353 transitions. [2021-07-09 17:28:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:34,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:34,934 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:35,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:35,135 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:35,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1749849636, now seen corresponding path program 175 times [2021-07-09 17:28:35,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:35,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461532012] [2021-07-09 17:28:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:35,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:35,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461532012] [2021-07-09 17:28:35,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461532012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:35,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236313105] [2021-07-09 17:28:35,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:35,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:35,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:35,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236313105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:35,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:35,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:35,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375311487] [2021-07-09 17:28:35,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:35,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:35,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:35,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:35,682 INFO L87 Difference]: Start difference. First operand 159 states and 353 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:36,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:36,077 INFO L93 Difference]: Finished difference Result 222 states and 464 transitions. [2021-07-09 17:28:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:28:36,077 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:36,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:36,078 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:28:36,078 INFO L226 Difference]: Without dead ends: 203 [2021-07-09 17:28:36,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 620.9ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:28:36,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-09 17:28:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 159. [2021-07-09 17:28:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2341772151898733) internal successors, (353), 158 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 353 transitions. [2021-07-09 17:28:36,080 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 353 transitions. Word has length 18 [2021-07-09 17:28:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:36,080 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 353 transitions. [2021-07-09 17:28:36,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 353 transitions. [2021-07-09 17:28:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:36,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:36,081 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:36,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1204 [2021-07-09 17:28:36,281 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash -208132746, now seen corresponding path program 176 times [2021-07-09 17:28:36,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:36,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438390280] [2021-07-09 17:28:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:36,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:36,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438390280] [2021-07-09 17:28:36,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438390280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:36,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709296199] [2021-07-09 17:28:36,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:36,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:36,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:36,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:36,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:36,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709296199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:36,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:36,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:36,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16082924] [2021-07-09 17:28:36,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:36,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:36,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:36,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:36,844 INFO L87 Difference]: Start difference. First operand 159 states and 353 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:37,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:37,125 INFO L93 Difference]: Finished difference Result 177 states and 380 transitions. [2021-07-09 17:28:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:28:37,126 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:37,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:37,126 INFO L225 Difference]: With dead ends: 177 [2021-07-09 17:28:37,126 INFO L226 Difference]: Without dead ends: 164 [2021-07-09 17:28:37,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 586.7ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:28:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-07-09 17:28:37,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2021-07-09 17:28:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.23125) internal successors, (357), 160 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 357 transitions. [2021-07-09 17:28:37,128 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 357 transitions. Word has length 18 [2021-07-09 17:28:37,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:37,128 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 357 transitions. [2021-07-09 17:28:37,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 357 transitions. [2021-07-09 17:28:37,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:37,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:37,129 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:37,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1216,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:37,329 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:37,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:37,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1785474476, now seen corresponding path program 177 times [2021-07-09 17:28:37,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:37,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221068246] [2021-07-09 17:28:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:37,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:37,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221068246] [2021-07-09 17:28:37,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221068246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:37,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094387064] [2021-07-09 17:28:37,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:37,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:28:37,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:37,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:28:37,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:37,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094387064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:37,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:37,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:37,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031270695] [2021-07-09 17:28:37,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:37,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:37,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:37,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:37,929 INFO L87 Difference]: Start difference. First operand 161 states and 357 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:38,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:38,603 INFO L93 Difference]: Finished difference Result 216 states and 440 transitions. [2021-07-09 17:28:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:28:38,603 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:38,604 INFO L225 Difference]: With dead ends: 216 [2021-07-09 17:28:38,604 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:28:38,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 938.0ms TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:28:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:28:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 160. [2021-07-09 17:28:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2327044025157234) internal successors, (355), 159 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 355 transitions. [2021-07-09 17:28:38,606 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 355 transitions. Word has length 18 [2021-07-09 17:28:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:38,606 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 355 transitions. [2021-07-09 17:28:38,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:38,606 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 355 transitions. [2021-07-09 17:28:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:38,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:38,606 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:38,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-07-09 17:28:38,807 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:38,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1279128210, now seen corresponding path program 178 times [2021-07-09 17:28:38,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:38,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862527038] [2021-07-09 17:28:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:39,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:39,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862527038] [2021-07-09 17:28:39,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862527038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:39,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892528093] [2021-07-09 17:28:39,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:39,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:39,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:39,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:39,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892528093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:39,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:39,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:39,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281546667] [2021-07-09 17:28:39,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:39,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:39,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:39,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:39,364 INFO L87 Difference]: Start difference. First operand 160 states and 355 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:40,230 INFO L93 Difference]: Finished difference Result 228 states and 475 transitions. [2021-07-09 17:28:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:40,231 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:40,231 INFO L225 Difference]: With dead ends: 228 [2021-07-09 17:28:40,231 INFO L226 Difference]: Without dead ends: 210 [2021-07-09 17:28:40,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1150.9ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:28:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-09 17:28:40,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2021-07-09 17:28:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2439024390243905) internal successors, (368), 164 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 368 transitions. [2021-07-09 17:28:40,233 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 368 transitions. Word has length 18 [2021-07-09 17:28:40,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:40,233 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 368 transitions. [2021-07-09 17:28:40,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 368 transitions. [2021-07-09 17:28:40,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:40,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:40,234 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:40,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1238,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:40,445 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:40,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:40,445 INFO L82 PathProgramCache]: Analyzing trace with hash 55463120, now seen corresponding path program 179 times [2021-07-09 17:28:40,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:40,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420113990] [2021-07-09 17:28:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:40,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:40,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420113990] [2021-07-09 17:28:40,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420113990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:40,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035350285] [2021-07-09 17:28:40,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:40,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:28:40,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:40,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:40,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:40,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035350285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:40,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:40,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:40,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316976290] [2021-07-09 17:28:40,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:40,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:40,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:40,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:40,911 INFO L87 Difference]: Start difference. First operand 165 states and 368 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:41,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:41,588 INFO L93 Difference]: Finished difference Result 227 states and 468 transitions. [2021-07-09 17:28:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:41,589 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:28:41,589 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:28:41,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 828.8ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:28:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:28:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 161. [2021-07-09 17:28:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.23125) internal successors, (357), 160 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 357 transitions. [2021-07-09 17:28:41,591 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 357 transitions. Word has length 18 [2021-07-09 17:28:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:41,591 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 357 transitions. [2021-07-09 17:28:41,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 357 transitions. [2021-07-09 17:28:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:41,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:41,591 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:41,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1249,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:41,808 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:41,808 INFO L82 PathProgramCache]: Analyzing trace with hash -482392458, now seen corresponding path program 180 times [2021-07-09 17:28:41,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:41,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504240442] [2021-07-09 17:28:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:41,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:41,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504240442] [2021-07-09 17:28:41,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504240442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:41,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892215519] [2021-07-09 17:28:41,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:41,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:28:41,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:41,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:41,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:42,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892215519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:42,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:42,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:42,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774508907] [2021-07-09 17:28:42,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:42,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:42,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:42,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:42,356 INFO L87 Difference]: Start difference. First operand 161 states and 357 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:42,799 INFO L93 Difference]: Finished difference Result 224 states and 468 transitions. [2021-07-09 17:28:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:28:42,799 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:42,800 INFO L225 Difference]: With dead ends: 224 [2021-07-09 17:28:42,800 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:28:42,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 624.1ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:28:42,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:28:42,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2021-07-09 17:28:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2327044025157234) internal successors, (355), 159 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 355 transitions. [2021-07-09 17:28:42,802 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 355 transitions. Word has length 18 [2021-07-09 17:28:42,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:42,802 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 355 transitions. [2021-07-09 17:28:42,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:42,802 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 355 transitions. [2021-07-09 17:28:42,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:42,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:42,802 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:43,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1262,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:43,003 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:43,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1532704148, now seen corresponding path program 181 times [2021-07-09 17:28:43,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:43,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170221253] [2021-07-09 17:28:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:43,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:43,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170221253] [2021-07-09 17:28:43,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170221253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:43,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418169940] [2021-07-09 17:28:43,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:43,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:43,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418169940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:43,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:43,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:43,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029181311] [2021-07-09 17:28:43,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:43,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:43,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:43,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:43,552 INFO L87 Difference]: Start difference. First operand 160 states and 355 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:44,268 INFO L93 Difference]: Finished difference Result 218 states and 444 transitions. [2021-07-09 17:28:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:28:44,269 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:44,269 INFO L225 Difference]: With dead ends: 218 [2021-07-09 17:28:44,269 INFO L226 Difference]: Without dead ends: 186 [2021-07-09 17:28:44,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 916.0ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:28:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-09 17:28:44,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-07-09 17:28:44,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2375) internal successors, (358), 160 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 358 transitions. [2021-07-09 17:28:44,271 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 358 transitions. Word has length 18 [2021-07-09 17:28:44,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:44,271 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 358 transitions. [2021-07-09 17:28:44,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 358 transitions. [2021-07-09 17:28:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:44,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:44,272 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:44,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:44,472 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:44,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:44,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2078756465, now seen corresponding path program 182 times [2021-07-09 17:28:44,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:44,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391414109] [2021-07-09 17:28:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:28:44,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:44,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391414109] [2021-07-09 17:28:44,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391414109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:44,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531046978] [2021-07-09 17:28:44,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:44,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:44,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:44,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:28:44,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:28:44,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531046978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:44,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:44,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:28:44,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201155927] [2021-07-09 17:28:44,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:28:44,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:44,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:28:44,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:28:44,764 INFO L87 Difference]: Start difference. First operand 161 states and 358 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:44,885 INFO L93 Difference]: Finished difference Result 170 states and 372 transitions. [2021-07-09 17:28:44,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:28:44,885 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:44,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:44,886 INFO L225 Difference]: With dead ends: 170 [2021-07-09 17:28:44,886 INFO L226 Difference]: Without dead ends: 170 [2021-07-09 17:28:44,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:28:44,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-07-09 17:28:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2021-07-09 17:28:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:44,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-07-09 17:28:44,888 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-07-09 17:28:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:44,888 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-07-09 17:28:44,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:44,888 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-07-09 17:28:44,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:44,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:44,888 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:45,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:45,089 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:45,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1965527396, now seen corresponding path program 183 times [2021-07-09 17:28:45,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:45,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255811229] [2021-07-09 17:28:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:45,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:45,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255811229] [2021-07-09 17:28:45,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255811229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:45,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93827969] [2021-07-09 17:28:45,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:45,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:28:45,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:45,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:45,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:45,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93827969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:45,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:45,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:45,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270047408] [2021-07-09 17:28:45,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:45,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:45,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:45,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:45,634 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:46,100 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-07-09 17:28:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:46,100 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:46,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:46,100 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:28:46,100 INFO L226 Difference]: Without dead ends: 203 [2021-07-09 17:28:46,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 687.1ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:28:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-09 17:28:46,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 159. [2021-07-09 17:28:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-07-09 17:28:46,102 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-07-09 17:28:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:46,102 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-07-09 17:28:46,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-07-09 17:28:46,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:46,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:46,103 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:46,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:46,319 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1459181130, now seen corresponding path program 184 times [2021-07-09 17:28:46,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:46,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673691428] [2021-07-09 17:28:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:46,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:46,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673691428] [2021-07-09 17:28:46,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673691428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:46,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294196754] [2021-07-09 17:28:46,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:46,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:46,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:46,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:28:46,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:46,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294196754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:46,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:46,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:46,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388841129] [2021-07-09 17:28:46,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:46,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:46,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:46,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:46,864 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:47,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:47,355 INFO L93 Difference]: Finished difference Result 226 states and 470 transitions. [2021-07-09 17:28:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:28:47,355 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:47,356 INFO L225 Difference]: With dead ends: 226 [2021-07-09 17:28:47,356 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:28:47,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 704.5ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:28:47,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:28:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 159. [2021-07-09 17:28:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-07-09 17:28:47,358 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-07-09 17:28:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:47,358 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-07-09 17:28:47,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-07-09 17:28:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:47,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:47,358 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:47,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1303 [2021-07-09 17:28:47,566 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:47,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:47,566 INFO L82 PathProgramCache]: Analyzing trace with hash 428334108, now seen corresponding path program 185 times [2021-07-09 17:28:47,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:47,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347620543] [2021-07-09 17:28:47,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:47,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:47,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347620543] [2021-07-09 17:28:47,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347620543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:47,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184625473] [2021-07-09 17:28:47,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:47,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:28:47,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:47,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:28:47,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:48,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184625473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:48,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:48,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:48,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056396971] [2021-07-09 17:28:48,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:48,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:48,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:48,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:48,084 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:48,939 INFO L93 Difference]: Finished difference Result 207 states and 433 transitions. [2021-07-09 17:28:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:28:48,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:48,940 INFO L225 Difference]: With dead ends: 207 [2021-07-09 17:28:48,940 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:28:48,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 978.8ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:28:48,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:28:48,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 161. [2021-07-09 17:28:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.225) internal successors, (356), 160 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 356 transitions. [2021-07-09 17:28:48,942 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 356 transitions. Word has length 18 [2021-07-09 17:28:48,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:48,942 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 356 transitions. [2021-07-09 17:28:48,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 356 transitions. [2021-07-09 17:28:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:48,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:48,943 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:49,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:49,149 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1149007622, now seen corresponding path program 186 times [2021-07-09 17:28:49,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:49,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114088766] [2021-07-09 17:28:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:49,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:49,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114088766] [2021-07-09 17:28:49,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114088766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:49,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923913596] [2021-07-09 17:28:49,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:49,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:28:49,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:49,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:49,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:49,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923913596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:49,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:49,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:49,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560562941] [2021-07-09 17:28:49,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:49,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:49,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:49,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:49,707 INFO L87 Difference]: Start difference. First operand 161 states and 356 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:51,269 INFO L93 Difference]: Finished difference Result 266 states and 523 transitions. [2021-07-09 17:28:51,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:28:51,270 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:51,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:51,270 INFO L225 Difference]: With dead ends: 266 [2021-07-09 17:28:51,270 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:28:51,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1732.3ms TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:28:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:28:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 164. [2021-07-09 17:28:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2392638036809815) internal successors, (365), 163 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:51,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 365 transitions. [2021-07-09 17:28:51,273 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 365 transitions. Word has length 18 [2021-07-09 17:28:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:51,273 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 365 transitions. [2021-07-09 17:28:51,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:51,273 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 365 transitions. [2021-07-09 17:28:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:51,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:51,273 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:51,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:51,480 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:51,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:51,480 INFO L82 PathProgramCache]: Analyzing trace with hash -642661356, now seen corresponding path program 187 times [2021-07-09 17:28:51,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:51,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891965089] [2021-07-09 17:28:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:51,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:51,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891965089] [2021-07-09 17:28:51,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891965089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:51,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382842229] [2021-07-09 17:28:51,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:51,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:28:51,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:52,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382842229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:52,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:52,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:52,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850828002] [2021-07-09 17:28:52,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:52,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:52,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:52,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:52,021 INFO L87 Difference]: Start difference. First operand 164 states and 365 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:52,887 INFO L93 Difference]: Finished difference Result 228 states and 469 transitions. [2021-07-09 17:28:52,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:28:52,887 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:52,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:52,888 INFO L225 Difference]: With dead ends: 228 [2021-07-09 17:28:52,888 INFO L226 Difference]: Without dead ends: 203 [2021-07-09 17:28:52,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1038.6ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:28:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-09 17:28:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-07-09 17:28:52,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2378048780487805) internal successors, (367), 164 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 367 transitions. [2021-07-09 17:28:52,890 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 367 transitions. Word has length 18 [2021-07-09 17:28:52,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:52,890 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 367 transitions. [2021-07-09 17:28:52,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:52,890 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 367 transitions. [2021-07-09 17:28:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:52,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:52,890 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:53,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1338 [2021-07-09 17:28:53,090 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:53,091 INFO L82 PathProgramCache]: Analyzing trace with hash 154074396, now seen corresponding path program 188 times [2021-07-09 17:28:53,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:53,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130199996] [2021-07-09 17:28:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:53,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:53,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130199996] [2021-07-09 17:28:53,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130199996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:53,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955414215] [2021-07-09 17:28:53,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:53,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:53,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:53,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:53,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:53,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955414215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:53,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:53,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:53,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920604302] [2021-07-09 17:28:53,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:53,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:53,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:53,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:53,636 INFO L87 Difference]: Start difference. First operand 165 states and 367 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:54,117 INFO L93 Difference]: Finished difference Result 233 states and 476 transitions. [2021-07-09 17:28:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:28:54,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:54,118 INFO L225 Difference]: With dead ends: 233 [2021-07-09 17:28:54,118 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:28:54,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 665.8ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:28:54,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:28:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 166. [2021-07-09 17:28:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.2363636363636363) internal successors, (369), 165 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:54,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 369 transitions. [2021-07-09 17:28:54,120 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 369 transitions. Word has length 18 [2021-07-09 17:28:54,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:54,121 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 369 transitions. [2021-07-09 17:28:54,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:54,121 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 369 transitions. [2021-07-09 17:28:54,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:54,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:54,121 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:54,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1351,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:54,337 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:54,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:54,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2125796294, now seen corresponding path program 189 times [2021-07-09 17:28:54,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:54,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312452486] [2021-07-09 17:28:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:54,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:54,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312452486] [2021-07-09 17:28:54,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312452486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:54,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001401536] [2021-07-09 17:28:54,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:54,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:28:54,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:54,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:28:54,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:54,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001401536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:54,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:54,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:54,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819024620] [2021-07-09 17:28:54,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:54,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:54,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:54,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:54,882 INFO L87 Difference]: Start difference. First operand 166 states and 369 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:55,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:55,511 INFO L93 Difference]: Finished difference Result 223 states and 456 transitions. [2021-07-09 17:28:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:28:55,511 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:55,511 INFO L225 Difference]: With dead ends: 223 [2021-07-09 17:28:55,512 INFO L226 Difference]: Without dead ends: 191 [2021-07-09 17:28:55,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 872.5ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:28:55,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-09 17:28:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 168. [2021-07-09 17:28:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2335329341317367) internal successors, (373), 167 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 373 transitions. [2021-07-09 17:28:55,517 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 373 transitions. Word has length 18 [2021-07-09 17:28:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:55,517 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 373 transitions. [2021-07-09 17:28:55,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 373 transitions. [2021-07-09 17:28:55,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:55,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:55,517 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:55,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-07-09 17:28:55,718 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1329060542, now seen corresponding path program 190 times [2021-07-09 17:28:55,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:55,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117616554] [2021-07-09 17:28:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:55,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:55,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117616554] [2021-07-09 17:28:55,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117616554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:55,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135390000] [2021-07-09 17:28:55,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:55,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:55,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:55,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:55,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:56,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135390000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:56,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:56,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:56,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007273725] [2021-07-09 17:28:56,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:56,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:56,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:56,251 INFO L87 Difference]: Start difference. First operand 168 states and 373 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:56,817 INFO L93 Difference]: Finished difference Result 235 states and 480 transitions. [2021-07-09 17:28:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:28:56,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:56,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:56,818 INFO L225 Difference]: With dead ends: 235 [2021-07-09 17:28:56,818 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 17:28:56,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 785.7ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:28:56,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 17:28:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-07-09 17:28:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.2349397590361444) internal successors, (371), 166 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 371 transitions. [2021-07-09 17:28:56,820 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 371 transitions. Word has length 18 [2021-07-09 17:28:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:56,820 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 371 transitions. [2021-07-09 17:28:56,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 371 transitions. [2021-07-09 17:28:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:56,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:56,821 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:57,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-07-09 17:28:57,021 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash -822714276, now seen corresponding path program 191 times [2021-07-09 17:28:57,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:57,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809729195] [2021-07-09 17:28:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:57,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:57,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809729195] [2021-07-09 17:28:57,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809729195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:57,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702930040] [2021-07-09 17:28:57,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:57,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:28:57,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:57,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:28:57,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:57,416 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 17:28:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:57,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702930040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:57,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:57,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:57,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865203957] [2021-07-09 17:28:57,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:57,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:57,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:57,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:57,599 INFO L87 Difference]: Start difference. First operand 167 states and 371 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:58,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:58,266 INFO L93 Difference]: Finished difference Result 239 states and 488 transitions. [2021-07-09 17:28:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:28:58,267 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:58,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:58,267 INFO L225 Difference]: With dead ends: 239 [2021-07-09 17:28:58,267 INFO L226 Difference]: Without dead ends: 214 [2021-07-09 17:28:58,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 883.2ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:28:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-09 17:28:58,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 168. [2021-07-09 17:28:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2335329341317367) internal successors, (373), 167 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 373 transitions. [2021-07-09 17:28:58,269 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 373 transitions. Word has length 18 [2021-07-09 17:28:58,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:58,269 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 373 transitions. [2021-07-09 17:28:58,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 373 transitions. [2021-07-09 17:28:58,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:58,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:58,270 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:58,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-07-09 17:28:58,485 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:58,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:58,485 INFO L82 PathProgramCache]: Analyzing trace with hash -858339116, now seen corresponding path program 192 times [2021-07-09 17:28:58,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:58,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088050259] [2021-07-09 17:28:58,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:58,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:58,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088050259] [2021-07-09 17:28:58,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088050259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:58,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534937616] [2021-07-09 17:28:58,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:58,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:28:58,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:58,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:28:58,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:59,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534937616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:59,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:59,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:28:59,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27189630] [2021-07-09 17:28:59,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:28:59,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:59,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:28:59,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:28:59,045 INFO L87 Difference]: Start difference. First operand 168 states and 373 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:59,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:59,855 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-07-09 17:28:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:28:59,855 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:28:59,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:59,856 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:28:59,856 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:28:59,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 994.4ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:28:59,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:28:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 171. [2021-07-09 17:28:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2294117647058824) internal successors, (379), 170 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 379 transitions. [2021-07-09 17:28:59,858 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 379 transitions. Word has length 18 [2021-07-09 17:28:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:59,858 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 379 transitions. [2021-07-09 17:28:59,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:59,858 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 379 transitions. [2021-07-09 17:28:59,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:28:59,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:59,858 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:00,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1398 [2021-07-09 17:29:00,058 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:00,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:00,059 INFO L82 PathProgramCache]: Analyzing trace with hash -61603364, now seen corresponding path program 193 times [2021-07-09 17:29:00,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:00,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948057161] [2021-07-09 17:29:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:00,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:00,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948057161] [2021-07-09 17:29:00,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948057161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:00,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753230811] [2021-07-09 17:29:00,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:00,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:00,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:00,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753230811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:00,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:00,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:00,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223153822] [2021-07-09 17:29:00,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:00,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:00,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:00,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:00,626 INFO L87 Difference]: Start difference. First operand 171 states and 379 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:01,159 INFO L93 Difference]: Finished difference Result 238 states and 486 transitions. [2021-07-09 17:29:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:29:01,159 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:01,159 INFO L225 Difference]: With dead ends: 238 [2021-07-09 17:29:01,159 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:29:01,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 735.6ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:29:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2021-07-09 17:29:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.230769230769231) internal successors, (377), 169 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-07-09 17:29:01,162 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-07-09 17:29:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:01,162 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-07-09 17:29:01,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-07-09 17:29:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:01,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:01,162 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:01,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-07-09 17:29:01,363 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash 444742902, now seen corresponding path program 194 times [2021-07-09 17:29:01,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:01,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071958600] [2021-07-09 17:29:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:01,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:01,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071958600] [2021-07-09 17:29:01,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071958600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:01,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049839591] [2021-07-09 17:29:01,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:01,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:01,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:01,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:01,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:01,745 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 17:29:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:01,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049839591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:01,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:01,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:01,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606960772] [2021-07-09 17:29:01,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:01,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:01,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:01,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:01,925 INFO L87 Difference]: Start difference. First operand 170 states and 377 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:02,496 INFO L93 Difference]: Finished difference Result 240 states and 490 transitions. [2021-07-09 17:29:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:29:02,496 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:02,496 INFO L225 Difference]: With dead ends: 240 [2021-07-09 17:29:02,496 INFO L226 Difference]: Without dead ends: 215 [2021-07-09 17:29:02,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 791.7ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-07-09 17:29:02,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 169. [2021-07-09 17:29:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.232142857142857) internal successors, (375), 168 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 375 transitions. [2021-07-09 17:29:02,499 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 375 transitions. Word has length 18 [2021-07-09 17:29:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:02,499 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 375 transitions. [2021-07-09 17:29:02,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 375 transitions. [2021-07-09 17:29:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:02,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:02,499 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:02,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1423 [2021-07-09 17:29:02,700 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:02,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1038392036, now seen corresponding path program 195 times [2021-07-09 17:29:02,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:02,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285203109] [2021-07-09 17:29:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:02,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:02,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285203109] [2021-07-09 17:29:02,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285203109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:02,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203665745] [2021-07-09 17:29:02,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:02,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:29:02,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:02,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:29:02,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:03,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203665745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:03,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:03,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:29:03,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033954599] [2021-07-09 17:29:03,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:29:03,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:03,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:29:03,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:03,233 INFO L87 Difference]: Start difference. First operand 169 states and 375 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:04,361 INFO L93 Difference]: Finished difference Result 255 states and 513 transitions. [2021-07-09 17:29:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:29:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:04,361 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:29:04,361 INFO L226 Difference]: Without dead ends: 217 [2021-07-09 17:29:04,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1257.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:29:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-09 17:29:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 170. [2021-07-09 17:29:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.230769230769231) internal successors, (377), 169 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-07-09 17:29:04,364 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-07-09 17:29:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:04,364 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-07-09 17:29:04,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-07-09 17:29:04,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:04,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:04,364 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:04,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:04,573 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:04,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1142907740, now seen corresponding path program 196 times [2021-07-09 17:29:04,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:04,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180032965] [2021-07-09 17:29:04,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:04,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:04,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180032965] [2021-07-09 17:29:04,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180032965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:04,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173626823] [2021-07-09 17:29:04,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:04,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:04,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:04,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:04,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:05,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173626823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:05,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:05,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:29:05,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416253252] [2021-07-09 17:29:05,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:29:05,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:05,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:29:05,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:05,037 INFO L87 Difference]: Start difference. First operand 170 states and 377 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:05,389 INFO L93 Difference]: Finished difference Result 188 states and 403 transitions. [2021-07-09 17:29:05,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:05,389 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:05,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:05,390 INFO L225 Difference]: With dead ends: 188 [2021-07-09 17:29:05,390 INFO L226 Difference]: Without dead ends: 173 [2021-07-09 17:29:05,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 576.3ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-09 17:29:05,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2021-07-09 17:29:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2294117647058824) internal successors, (379), 170 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 379 transitions. [2021-07-09 17:29:05,392 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 379 transitions. Word has length 18 [2021-07-09 17:29:05,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:05,392 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 379 transitions. [2021-07-09 17:29:05,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:05,392 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 379 transitions. [2021-07-09 17:29:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:05,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:05,392 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:05,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1446 [2021-07-09 17:29:05,593 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:05,593 INFO L82 PathProgramCache]: Analyzing trace with hash -510045634, now seen corresponding path program 197 times [2021-07-09 17:29:05,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:05,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892739890] [2021-07-09 17:29:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:05,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:05,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892739890] [2021-07-09 17:29:05,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892739890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:05,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015694857] [2021-07-09 17:29:05,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:05,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:29:05,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:05,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:05,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:06,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015694857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:06,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:06,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:29:06,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129838943] [2021-07-09 17:29:06,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:29:06,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:06,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:29:06,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:06,155 INFO L87 Difference]: Start difference. First operand 171 states and 379 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:06,504 INFO L93 Difference]: Finished difference Result 187 states and 402 transitions. [2021-07-09 17:29:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:06,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:06,504 INFO L225 Difference]: With dead ends: 187 [2021-07-09 17:29:06,504 INFO L226 Difference]: Without dead ends: 174 [2021-07-09 17:29:06,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 664.3ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-09 17:29:06,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2021-07-09 17:29:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2280701754385963) internal successors, (381), 171 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 381 transitions. [2021-07-09 17:29:06,506 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 381 transitions. Word has length 18 [2021-07-09 17:29:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:06,506 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 381 transitions. [2021-07-09 17:29:06,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 381 transitions. [2021-07-09 17:29:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:06,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:06,507 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:06,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1456 [2021-07-09 17:29:06,707 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:06,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2087387364, now seen corresponding path program 198 times [2021-07-09 17:29:06,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:06,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558216952] [2021-07-09 17:29:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:06,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:06,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558216952] [2021-07-09 17:29:06,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558216952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:06,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119977073] [2021-07-09 17:29:06,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:06,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:29:06,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:06,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:07,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119977073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:07,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:07,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:29:07,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858851028] [2021-07-09 17:29:07,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:29:07,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:07,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:29:07,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:07,304 INFO L87 Difference]: Start difference. First operand 172 states and 381 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:08,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:08,238 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2021-07-09 17:29:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:29:08,238 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:08,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:08,238 INFO L225 Difference]: With dead ends: 228 [2021-07-09 17:29:08,238 INFO L226 Difference]: Without dead ends: 196 [2021-07-09 17:29:08,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1174.3ms TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:29:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-07-09 17:29:08,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 170. [2021-07-09 17:29:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.230769230769231) internal successors, (377), 169 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-07-09 17:29:08,240 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-07-09 17:29:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:08,240 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-07-09 17:29:08,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:08,240 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-07-09 17:29:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:08,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:08,241 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:08,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1467,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:08,441 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:08,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:08,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1993180572, now seen corresponding path program 199 times [2021-07-09 17:29:08,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:08,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057498000] [2021-07-09 17:29:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:08,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:08,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057498000] [2021-07-09 17:29:08,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057498000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:08,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729924432] [2021-07-09 17:29:08,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:08,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:08,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:08,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729924432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:08,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:08,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:08,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201780652] [2021-07-09 17:29:08,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:08,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:08,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:08,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:08,995 INFO L87 Difference]: Start difference. First operand 170 states and 377 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:09,341 INFO L93 Difference]: Finished difference Result 187 states and 404 transitions. [2021-07-09 17:29:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:29:09,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:09,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:09,342 INFO L225 Difference]: With dead ends: 187 [2021-07-09 17:29:09,342 INFO L226 Difference]: Without dead ends: 180 [2021-07-09 17:29:09,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 621.2ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:29:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-09 17:29:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2021-07-09 17:29:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2339181286549707) internal successors, (382), 171 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 382 transitions. [2021-07-09 17:29:09,344 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 382 transitions. Word has length 18 [2021-07-09 17:29:09,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:09,344 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 382 transitions. [2021-07-09 17:29:09,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 382 transitions. [2021-07-09 17:29:09,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:09,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:09,345 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:09,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-07-09 17:29:09,545 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:09,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:09,545 INFO L82 PathProgramCache]: Analyzing trace with hash 724444994, now seen corresponding path program 200 times [2021-07-09 17:29:09,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:09,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761471876] [2021-07-09 17:29:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:09,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:09,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761471876] [2021-07-09 17:29:09,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761471876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:09,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302543988] [2021-07-09 17:29:09,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:09,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:09,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:09,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:09,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:10,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302543988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:10,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:10,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:10,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726289330] [2021-07-09 17:29:10,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:10,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:10,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:10,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:10,223 INFO L87 Difference]: Start difference. First operand 172 states and 382 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:10,790 INFO L93 Difference]: Finished difference Result 218 states and 454 transitions. [2021-07-09 17:29:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:29:10,790 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:10,791 INFO L225 Difference]: With dead ends: 218 [2021-07-09 17:29:10,791 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:29:10,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 848.5ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:29:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:29:10,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 173. [2021-07-09 17:29:10,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-07-09 17:29:10,793 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 18 [2021-07-09 17:29:10,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:10,793 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-07-09 17:29:10,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:10,793 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-07-09 17:29:10,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:10,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:10,793 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:10,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:10,994 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:10,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:10,994 INFO L82 PathProgramCache]: Analyzing trace with hash 2059036324, now seen corresponding path program 201 times [2021-07-09 17:29:10,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:10,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141269976] [2021-07-09 17:29:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:11,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:11,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141269976] [2021-07-09 17:29:11,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141269976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:11,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963938987] [2021-07-09 17:29:11,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:11,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:29:11,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:11,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:11,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:11,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963938987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:11,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:11,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:11,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712148059] [2021-07-09 17:29:11,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:11,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:11,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:11,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:11,530 INFO L87 Difference]: Start difference. First operand 173 states and 384 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:12,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:12,660 INFO L93 Difference]: Finished difference Result 250 states and 508 transitions. [2021-07-09 17:29:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:29:12,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:12,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:12,661 INFO L225 Difference]: With dead ends: 250 [2021-07-09 17:29:12,661 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:29:12,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1239.7ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:29:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:29:12,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 174. [2021-07-09 17:29:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.23121387283237) internal successors, (386), 173 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 386 transitions. [2021-07-09 17:29:12,663 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 386 transitions. Word has length 18 [2021-07-09 17:29:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:12,663 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 386 transitions. [2021-07-09 17:29:12,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 386 transitions. [2021-07-09 17:29:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:12,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:12,664 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:12,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1502 [2021-07-09 17:29:12,864 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:12,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:12,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1437986497, now seen corresponding path program 202 times [2021-07-09 17:29:12,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:12,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594516422] [2021-07-09 17:29:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:12,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:12,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594516422] [2021-07-09 17:29:12,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594516422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:12,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448855011] [2021-07-09 17:29:12,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:12,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:12,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:12,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:12,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:13,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448855011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:13,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:13,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:29:13,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249621278] [2021-07-09 17:29:13,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:29:13,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:13,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:29:13,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:13,098 INFO L87 Difference]: Start difference. First operand 174 states and 386 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:13,419 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2021-07-09 17:29:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:13,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:13,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:13,420 INFO L225 Difference]: With dead ends: 207 [2021-07-09 17:29:13,420 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:29:13,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 356.0ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:29:13,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:29:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 174. [2021-07-09 17:29:13,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.23121387283237) internal successors, (386), 173 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 386 transitions. [2021-07-09 17:29:13,422 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 386 transitions. Word has length 18 [2021-07-09 17:29:13,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:13,422 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 386 transitions. [2021-07-09 17:29:13,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 386 transitions. [2021-07-09 17:29:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:13,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:13,422 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:13,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1515,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:13,623 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:13,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:13,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1230791260, now seen corresponding path program 203 times [2021-07-09 17:29:13,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:13,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101956210] [2021-07-09 17:29:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:13,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101956210] [2021-07-09 17:29:13,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101956210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222978892] [2021-07-09 17:29:13,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:13,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:29:13,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:13,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:29:13,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:14,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222978892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:14,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:14,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:14,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567079214] [2021-07-09 17:29:14,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:14,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:14,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:14,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:14,312 INFO L87 Difference]: Start difference. First operand 174 states and 386 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:14,605 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-07-09 17:29:15,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:15,029 INFO L93 Difference]: Finished difference Result 227 states and 468 transitions. [2021-07-09 17:29:15,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:29:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:15,030 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:29:15,030 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:29:15,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1054.1ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:29:15,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 176. [2021-07-09 17:29:15,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2285714285714286) internal successors, (390), 175 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 390 transitions. [2021-07-09 17:29:15,032 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 390 transitions. Word has length 18 [2021-07-09 17:29:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:15,032 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 390 transitions. [2021-07-09 17:29:15,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:15,032 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 390 transitions. [2021-07-09 17:29:15,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:15,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:15,033 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:15,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1520 [2021-07-09 17:29:15,233 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:15,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1729584706, now seen corresponding path program 204 times [2021-07-09 17:29:15,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:15,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14352997] [2021-07-09 17:29:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:15,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:15,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14352997] [2021-07-09 17:29:15,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14352997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:15,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625628524] [2021-07-09 17:29:15,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:15,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:29:15,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:15,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:29:15,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:15,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625628524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:15,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:15,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:15,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862364311] [2021-07-09 17:29:15,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:15,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:15,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:15,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:15,721 INFO L87 Difference]: Start difference. First operand 176 states and 390 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:16,689 INFO L93 Difference]: Finished difference Result 273 states and 546 transitions. [2021-07-09 17:29:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:29:16,689 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:16,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:16,690 INFO L225 Difference]: With dead ends: 273 [2021-07-09 17:29:16,690 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:29:16,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1047.8ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:29:16,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:29:16,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 178. [2021-07-09 17:29:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-07-09 17:29:16,692 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 18 [2021-07-09 17:29:16,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:16,692 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-07-09 17:29:16,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:16,692 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-07-09 17:29:16,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:16,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:16,692 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:16,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1530,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:16,893 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:16,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2027527012, now seen corresponding path program 205 times [2021-07-09 17:29:16,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:16,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779073985] [2021-07-09 17:29:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:17,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:17,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779073985] [2021-07-09 17:29:17,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779073985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:17,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715256992] [2021-07-09 17:29:17,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:17,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:17,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715256992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:17,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:17,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:17,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530977047] [2021-07-09 17:29:17,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:17,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:17,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:17,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:17,340 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:18,250 INFO L93 Difference]: Finished difference Result 262 states and 533 transitions. [2021-07-09 17:29:18,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:29:18,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:18,251 INFO L225 Difference]: With dead ends: 262 [2021-07-09 17:29:18,251 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:29:18,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 973.2ms TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:29:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:29:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 174. [2021-07-09 17:29:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.213872832369942) internal successors, (383), 173 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 383 transitions. [2021-07-09 17:29:18,253 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 383 transitions. Word has length 18 [2021-07-09 17:29:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:18,253 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 383 transitions. [2021-07-09 17:29:18,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 383 transitions. [2021-07-09 17:29:18,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:18,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:18,253 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:18,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1542 [2021-07-09 17:29:18,454 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:18,454 INFO L82 PathProgramCache]: Analyzing trace with hash -725723394, now seen corresponding path program 206 times [2021-07-09 17:29:18,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:18,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564459027] [2021-07-09 17:29:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:18,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:18,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564459027] [2021-07-09 17:29:18,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564459027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:18,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647355507] [2021-07-09 17:29:18,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:18,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:18,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:18,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:18,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:18,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647355507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:18,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:18,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:18,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390121453] [2021-07-09 17:29:18,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:18,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:18,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:18,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:18,977 INFO L87 Difference]: Start difference. First operand 174 states and 383 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:19,399 INFO L93 Difference]: Finished difference Result 210 states and 446 transitions. [2021-07-09 17:29:19,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:19,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:19,399 INFO L225 Difference]: With dead ends: 210 [2021-07-09 17:29:19,399 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:29:19,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 656.0ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:29:19,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:29:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 176. [2021-07-09 17:29:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2114285714285713) internal successors, (387), 175 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 387 transitions. [2021-07-09 17:29:19,401 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 387 transitions. Word has length 18 [2021-07-09 17:29:19,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:19,401 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 387 transitions. [2021-07-09 17:29:19,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,401 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 387 transitions. [2021-07-09 17:29:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:19,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:19,402 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:19,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1552 [2021-07-09 17:29:19,602 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:19,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:19,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1991902172, now seen corresponding path program 207 times [2021-07-09 17:29:19,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:19,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370495013] [2021-07-09 17:29:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:19,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:19,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370495013] [2021-07-09 17:29:19,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370495013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:19,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165351030] [2021-07-09 17:29:19,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:19,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:29:19,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:19,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:29:19,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:20,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165351030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:20,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:20,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:20,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067078289] [2021-07-09 17:29:20,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:20,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:20,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:20,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:20,154 INFO L87 Difference]: Start difference. First operand 176 states and 387 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:20,901 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2021-07-09 17:29:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:29:20,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:20,901 INFO L225 Difference]: With dead ends: 228 [2021-07-09 17:29:20,902 INFO L226 Difference]: Without dead ends: 217 [2021-07-09 17:29:20,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 983.3ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:29:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-09 17:29:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 177. [2021-07-09 17:29:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.210227272727273) internal successors, (389), 176 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 389 transitions. [2021-07-09 17:29:20,904 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 389 transitions. Word has length 18 [2021-07-09 17:29:20,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:20,904 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 389 transitions. [2021-07-09 17:29:20,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:20,904 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 389 transitions. [2021-07-09 17:29:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:20,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:20,905 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:21,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1563 [2021-07-09 17:29:21,105 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:21,106 INFO L82 PathProgramCache]: Analyzing trace with hash -968473794, now seen corresponding path program 208 times [2021-07-09 17:29:21,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:21,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668062889] [2021-07-09 17:29:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:21,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:21,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668062889] [2021-07-09 17:29:21,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668062889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:21,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464453187] [2021-07-09 17:29:21,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:21,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:21,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:21,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:21,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:21,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464453187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:21,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:21,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:21,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725110869] [2021-07-09 17:29:21,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:21,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:21,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:21,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:21,597 INFO L87 Difference]: Start difference. First operand 177 states and 389 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:22,329 INFO L93 Difference]: Finished difference Result 237 states and 483 transitions. [2021-07-09 17:29:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:29:22,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:22,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:22,329 INFO L225 Difference]: With dead ends: 237 [2021-07-09 17:29:22,329 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:29:22,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 905.4ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:29:22,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:29:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 176. [2021-07-09 17:29:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2114285714285713) internal successors, (387), 175 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 387 transitions. [2021-07-09 17:29:22,331 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 387 transitions. Word has length 18 [2021-07-09 17:29:22,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:22,331 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 387 transitions. [2021-07-09 17:29:22,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 387 transitions. [2021-07-09 17:29:22,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:22,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:22,332 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:22,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1574 [2021-07-09 17:29:22,532 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:22,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:22,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1796718858, now seen corresponding path program 209 times [2021-07-09 17:29:22,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:22,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117186501] [2021-07-09 17:29:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:22,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:22,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117186501] [2021-07-09 17:29:22,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117186501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:22,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517338672] [2021-07-09 17:29:22,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:22,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:29:22,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:22,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:22,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:23,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517338672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:23,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:23,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:23,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444726926] [2021-07-09 17:29:23,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:23,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:23,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:23,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:23,102 INFO L87 Difference]: Start difference. First operand 176 states and 387 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:23,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:23,430 INFO L93 Difference]: Finished difference Result 207 states and 439 transitions. [2021-07-09 17:29:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:29:23,430 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:23,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:23,431 INFO L225 Difference]: With dead ends: 207 [2021-07-09 17:29:23,431 INFO L226 Difference]: Without dead ends: 196 [2021-07-09 17:29:23,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 608.0ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:29:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-07-09 17:29:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 178. [2021-07-09 17:29:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.209039548022599) internal successors, (391), 177 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 391 transitions. [2021-07-09 17:29:23,433 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 391 transitions. Word has length 18 [2021-07-09 17:29:23,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:23,433 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 391 transitions. [2021-07-09 17:29:23,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 391 transitions. [2021-07-09 17:29:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:23,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:23,433 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:23,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-07-09 17:29:23,634 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:23,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:23,634 INFO L82 PathProgramCache]: Analyzing trace with hash -462127528, now seen corresponding path program 210 times [2021-07-09 17:29:23,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:23,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012327592] [2021-07-09 17:29:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:23,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:23,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012327592] [2021-07-09 17:29:23,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012327592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:23,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757525935] [2021-07-09 17:29:23,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:23,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:29:23,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:23,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:23,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:24,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757525935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:24,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:24,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:24,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520875400] [2021-07-09 17:29:24,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:24,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:24,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:24,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:24,130 INFO L87 Difference]: Start difference. First operand 178 states and 391 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:25,133 INFO L93 Difference]: Finished difference Result 268 states and 536 transitions. [2021-07-09 17:29:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:29:25,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:25,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:25,134 INFO L225 Difference]: With dead ends: 268 [2021-07-09 17:29:25,134 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 17:29:25,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1164.3ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:29:25,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 17:29:25,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 179. [2021-07-09 17:29:25,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.207865168539326) internal successors, (393), 178 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 393 transitions. [2021-07-09 17:29:25,136 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 393 transitions. Word has length 18 [2021-07-09 17:29:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:25,136 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 393 transitions. [2021-07-09 17:29:25,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 393 transitions. [2021-07-09 17:29:25,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:25,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:25,137 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:25,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1596,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:25,353 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:25,353 INFO L82 PathProgramCache]: Analyzing trace with hash -999983106, now seen corresponding path program 211 times [2021-07-09 17:29:25,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:25,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540135493] [2021-07-09 17:29:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:25,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:25,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540135493] [2021-07-09 17:29:25,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540135493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:25,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589490532] [2021-07-09 17:29:25,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:25,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:25,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:25,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589490532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:25,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:25,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:25,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744271391] [2021-07-09 17:29:25,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:25,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:25,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:25,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:25,778 INFO L87 Difference]: Start difference. First operand 179 states and 393 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:26,458 INFO L93 Difference]: Finished difference Result 245 states and 513 transitions. [2021-07-09 17:29:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:29:26,458 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:26,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:26,458 INFO L225 Difference]: With dead ends: 245 [2021-07-09 17:29:26,458 INFO L226 Difference]: Without dead ends: 226 [2021-07-09 17:29:26,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 792.2ms TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:29:26,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-09 17:29:26,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 182. [2021-07-09 17:29:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2209944751381214) internal successors, (402), 181 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:26,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 402 transitions. [2021-07-09 17:29:26,461 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 402 transitions. Word has length 18 [2021-07-09 17:29:26,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:26,461 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 402 transitions. [2021-07-09 17:29:26,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:26,461 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 402 transitions. [2021-07-09 17:29:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:26,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:26,461 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:26,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:26,662 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:26,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:26,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1015113500, now seen corresponding path program 212 times [2021-07-09 17:29:26,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:26,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017202362] [2021-07-09 17:29:26,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:26,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:26,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017202362] [2021-07-09 17:29:26,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017202362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:26,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317451567] [2021-07-09 17:29:26,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:26,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:26,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:26,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:26,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:27,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317451567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:27,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:27,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:27,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154347563] [2021-07-09 17:29:27,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:27,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:27,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:27,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:27,202 INFO L87 Difference]: Start difference. First operand 182 states and 402 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:28,005 INFO L93 Difference]: Finished difference Result 260 states and 519 transitions. [2021-07-09 17:29:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:29:28,005 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:28,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:28,005 INFO L225 Difference]: With dead ends: 260 [2021-07-09 17:29:28,005 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 17:29:28,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 997.1ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:29:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 17:29:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2021-07-09 17:29:28,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2252747252747254) internal successors, (405), 182 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 405 transitions. [2021-07-09 17:29:28,010 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 405 transitions. Word has length 18 [2021-07-09 17:29:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:28,010 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 405 transitions. [2021-07-09 17:29:28,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 405 transitions. [2021-07-09 17:29:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:28,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:28,010 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:28,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:28,211 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:28,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1698620183, now seen corresponding path program 213 times [2021-07-09 17:29:28,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:28,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909484536] [2021-07-09 17:29:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:28,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:28,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909484536] [2021-07-09 17:29:28,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909484536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:28,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128910239] [2021-07-09 17:29:28,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:28,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:29:28,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:28,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:28,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:28,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128910239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:28,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:28,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:29:28,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908163186] [2021-07-09 17:29:28,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:29:28,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:28,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:29:28,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:28,474 INFO L87 Difference]: Start difference. First operand 183 states and 405 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:28,543 INFO L93 Difference]: Finished difference Result 184 states and 405 transitions. [2021-07-09 17:29:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:28,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:28,543 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:29:28,543 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:29:28,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:28,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:29:28,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 176. [2021-07-09 17:29:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2285714285714286) internal successors, (390), 175 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 390 transitions. [2021-07-09 17:29:28,545 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 390 transitions. Word has length 18 [2021-07-09 17:29:28,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:28,545 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 390 transitions. [2021-07-09 17:29:28,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:28,545 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 390 transitions. [2021-07-09 17:29:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:28,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:28,546 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:28,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1630 [2021-07-09 17:29:28,746 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1945262466, now seen corresponding path program 214 times [2021-07-09 17:29:28,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:28,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523689094] [2021-07-09 17:29:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:28,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:28,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523689094] [2021-07-09 17:29:28,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523689094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:28,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224893009] [2021-07-09 17:29:28,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:28,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:28,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:28,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:29,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224893009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:29,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:29,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:29,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700168670] [2021-07-09 17:29:29,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:29,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:29,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:29,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:29,201 INFO L87 Difference]: Start difference. First operand 176 states and 390 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:29,805 INFO L93 Difference]: Finished difference Result 247 states and 500 transitions. [2021-07-09 17:29:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:29:29,805 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:29,806 INFO L225 Difference]: With dead ends: 247 [2021-07-09 17:29:29,806 INFO L226 Difference]: Without dead ends: 221 [2021-07-09 17:29:29,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 778.0ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:29:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-07-09 17:29:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2021-07-09 17:29:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2298850574712645) internal successors, (388), 174 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 388 transitions. [2021-07-09 17:29:29,808 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 388 transitions. Word has length 18 [2021-07-09 17:29:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:29,808 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 388 transitions. [2021-07-09 17:29:29,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 388 transitions. [2021-07-09 17:29:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:29,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:29,808 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:30,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:30,009 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1811849252, now seen corresponding path program 215 times [2021-07-09 17:29:30,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:30,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824602264] [2021-07-09 17:29:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:30,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:30,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824602264] [2021-07-09 17:29:30,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824602264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:30,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191290059] [2021-07-09 17:29:30,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:30,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:29:30,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:30,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:30,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:30,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191290059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:30,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:30,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:30,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632929466] [2021-07-09 17:29:30,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:30,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:30,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:30,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:30,528 INFO L87 Difference]: Start difference. First operand 175 states and 388 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:31,383 INFO L93 Difference]: Finished difference Result 254 states and 520 transitions. [2021-07-09 17:29:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:29:31,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:31,384 INFO L225 Difference]: With dead ends: 254 [2021-07-09 17:29:31,384 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:29:31,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1047.0ms TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:29:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:29:31,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2021-07-09 17:29:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2429378531073447) internal successors, (397), 177 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 397 transitions. [2021-07-09 17:29:31,386 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 397 transitions. Word has length 18 [2021-07-09 17:29:31,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:31,386 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 397 transitions. [2021-07-09 17:29:31,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:31,386 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 397 transitions. [2021-07-09 17:29:31,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:31,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:31,386 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:31,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1648 [2021-07-09 17:29:31,587 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:31,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:31,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1976771778, now seen corresponding path program 216 times [2021-07-09 17:29:31,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:31,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983864008] [2021-07-09 17:29:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:31,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:31,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983864008] [2021-07-09 17:29:31,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983864008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:31,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12780945] [2021-07-09 17:29:31,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:31,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:29:31,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:31,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:31,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:32,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12780945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:32,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:32,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:32,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489689263] [2021-07-09 17:29:32,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:32,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:32,138 INFO L87 Difference]: Start difference. First operand 178 states and 397 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:33,333 INFO L93 Difference]: Finished difference Result 284 states and 575 transitions. [2021-07-09 17:29:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:29:33,333 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:33,334 INFO L225 Difference]: With dead ends: 284 [2021-07-09 17:29:33,334 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:29:33,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1366.0ms TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:29:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:29:33,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 180. [2021-07-09 17:29:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2513966480446927) internal successors, (403), 179 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 403 transitions. [2021-07-09 17:29:33,336 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 403 transitions. Word has length 18 [2021-07-09 17:29:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:33,336 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 403 transitions. [2021-07-09 17:29:33,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 403 transitions. [2021-07-09 17:29:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:33,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:33,337 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:33,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1659 [2021-07-09 17:29:33,553 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:33,553 INFO L82 PathProgramCache]: Analyzing trace with hash -89256540, now seen corresponding path program 217 times [2021-07-09 17:29:33,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:33,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017535905] [2021-07-09 17:29:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:33,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:33,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017535905] [2021-07-09 17:29:33,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017535905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:33,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883625223] [2021-07-09 17:29:33,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:33,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:33,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:34,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883625223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:34,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:34,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:34,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851285877] [2021-07-09 17:29:34,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:34,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:34,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:34,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:34,110 INFO L87 Difference]: Start difference. First operand 180 states and 403 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:34,495 INFO L93 Difference]: Finished difference Result 198 states and 431 transitions. [2021-07-09 17:29:34,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:34,495 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:34,495 INFO L225 Difference]: With dead ends: 198 [2021-07-09 17:29:34,495 INFO L226 Difference]: Without dead ends: 185 [2021-07-09 17:29:34,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 667.4ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:29:34,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-07-09 17:29:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2021-07-09 17:29:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.25) internal successors, (405), 180 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 405 transitions. [2021-07-09 17:29:34,497 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 405 transitions. Word has length 18 [2021-07-09 17:29:34,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:34,497 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 405 transitions. [2021-07-09 17:29:34,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 405 transitions. [2021-07-09 17:29:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:34,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:34,498 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:34,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-07-09 17:29:34,698 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:34,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:34,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1666598270, now seen corresponding path program 218 times [2021-07-09 17:29:34,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:34,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327894248] [2021-07-09 17:29:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:34,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:34,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327894248] [2021-07-09 17:29:34,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327894248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:34,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145761662] [2021-07-09 17:29:34,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:34,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:34,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:34,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:35,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145761662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:35,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:35,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:35,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37936130] [2021-07-09 17:29:35,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:35,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:35,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:35,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:35,313 INFO L87 Difference]: Start difference. First operand 181 states and 405 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:36,273 INFO L93 Difference]: Finished difference Result 211 states and 455 transitions. [2021-07-09 17:29:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:29:36,274 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:36,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:36,274 INFO L225 Difference]: With dead ends: 211 [2021-07-09 17:29:36,274 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:29:36,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1192.7ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:29:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:29:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 182. [2021-07-09 17:29:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.248618784530387) internal successors, (407), 181 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 407 transitions. [2021-07-09 17:29:36,276 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 407 transitions. Word has length 18 [2021-07-09 17:29:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:36,276 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 407 transitions. [2021-07-09 17:29:36,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 407 transitions. [2021-07-09 17:29:36,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:36,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:36,276 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:36,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1680 [2021-07-09 17:29:36,477 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:36,477 INFO L82 PathProgramCache]: Analyzing trace with hash -332006940, now seen corresponding path program 219 times [2021-07-09 17:29:36,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:36,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026343094] [2021-07-09 17:29:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:36,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:36,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026343094] [2021-07-09 17:29:36,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026343094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:36,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859297502] [2021-07-09 17:29:36,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:36,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:29:36,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:37,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859297502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:37,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:37,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:37,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841672153] [2021-07-09 17:29:37,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:37,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:37,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:37,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:37,020 INFO L87 Difference]: Start difference. First operand 182 states and 407 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:37,925 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-07-09 17:29:38,243 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-07-09 17:29:38,385 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2021-07-09 17:29:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:38,769 INFO L93 Difference]: Finished difference Result 264 states and 548 transitions. [2021-07-09 17:29:38,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:29:38,769 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:38,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:38,770 INFO L225 Difference]: With dead ends: 264 [2021-07-09 17:29:38,770 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:29:38,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1867.1ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:29:38,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:29:38,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 185. [2021-07-09 17:29:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.266304347826087) internal successors, (417), 184 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 417 transitions. [2021-07-09 17:29:38,772 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 417 transitions. Word has length 18 [2021-07-09 17:29:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:38,772 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 417 transitions. [2021-07-09 17:29:38,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 417 transitions. [2021-07-09 17:29:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:38,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:38,772 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:38,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1693 [2021-07-09 17:29:38,973 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:38,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1160252004, now seen corresponding path program 220 times [2021-07-09 17:29:38,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:38,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937665514] [2021-07-09 17:29:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:39,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:39,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937665514] [2021-07-09 17:29:39,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937665514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:39,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214613539] [2021-07-09 17:29:39,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:39,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:39,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:39,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214613539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:39,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:39,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:39,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627705034] [2021-07-09 17:29:39,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:39,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:39,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:39,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:39,511 INFO L87 Difference]: Start difference. First operand 185 states and 417 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:40,138 INFO L93 Difference]: Finished difference Result 217 states and 472 transitions. [2021-07-09 17:29:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:29:40,139 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:40,139 INFO L225 Difference]: With dead ends: 217 [2021-07-09 17:29:40,139 INFO L226 Difference]: Without dead ends: 206 [2021-07-09 17:29:40,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 855.1ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:29:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-07-09 17:29:40,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2021-07-09 17:29:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.263440860215054) internal successors, (421), 186 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 421 transitions. [2021-07-09 17:29:40,141 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 421 transitions. Word has length 18 [2021-07-09 17:29:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:40,141 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 421 transitions. [2021-07-09 17:29:40,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 421 transitions. [2021-07-09 17:29:40,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:40,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:40,141 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:40,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:40,350 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:40,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:40,350 INFO L82 PathProgramCache]: Analyzing trace with hash 174339326, now seen corresponding path program 221 times [2021-07-09 17:29:40,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:40,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120712740] [2021-07-09 17:29:40,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:40,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:40,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120712740] [2021-07-09 17:29:40,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120712740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:40,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676485486] [2021-07-09 17:29:40,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:40,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:29:40,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:40,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:40,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:40,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676485486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:40,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:40,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:40,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353932315] [2021-07-09 17:29:40,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:40,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:40,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:40,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:40,861 INFO L87 Difference]: Start difference. First operand 187 states and 421 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:41,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:41,595 INFO L93 Difference]: Finished difference Result 263 states and 543 transitions. [2021-07-09 17:29:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:29:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:41,596 INFO L225 Difference]: With dead ends: 263 [2021-07-09 17:29:41,596 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 17:29:41,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 884.7ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:29:41,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 17:29:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 186. [2021-07-09 17:29:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.264864864864865) internal successors, (419), 185 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 419 transitions. [2021-07-09 17:29:41,598 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 419 transitions. Word has length 18 [2021-07-09 17:29:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:41,598 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 419 transitions. [2021-07-09 17:29:41,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 419 transitions. [2021-07-09 17:29:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:41,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:41,599 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:41,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1714 [2021-07-09 17:29:41,799 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:41,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:41,799 INFO L82 PathProgramCache]: Analyzing trace with hash -363516252, now seen corresponding path program 222 times [2021-07-09 17:29:41,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:41,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728957572] [2021-07-09 17:29:41,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:41,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:41,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728957572] [2021-07-09 17:29:41,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728957572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:41,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503958563] [2021-07-09 17:29:41,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:41,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:29:41,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:41,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:41,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:42,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503958563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:42,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:42,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:42,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167992264] [2021-07-09 17:29:42,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:42,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:42,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:42,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:42,352 INFO L87 Difference]: Start difference. First operand 186 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:43,159 INFO L93 Difference]: Finished difference Result 265 states and 553 transitions. [2021-07-09 17:29:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:29:43,159 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:43,159 INFO L225 Difference]: With dead ends: 265 [2021-07-09 17:29:43,159 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:29:43,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1060.5ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:29:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:29:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 188. [2021-07-09 17:29:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2620320855614975) internal successors, (423), 187 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 423 transitions. [2021-07-09 17:29:43,162 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 423 transitions. Word has length 18 [2021-07-09 17:29:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:43,162 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 423 transitions. [2021-07-09 17:29:43,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 423 transitions. [2021-07-09 17:29:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:43,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:43,162 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:43,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1727,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:43,362 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:43,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1651580354, now seen corresponding path program 223 times [2021-07-09 17:29:43,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:43,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891011281] [2021-07-09 17:29:43,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:43,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:43,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891011281] [2021-07-09 17:29:43,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891011281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:43,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219046155] [2021-07-09 17:29:43,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:43,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:43,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:43,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219046155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:43,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:43,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92410771] [2021-07-09 17:29:43,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:43,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:43,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:43,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:43,890 INFO L87 Difference]: Start difference. First operand 188 states and 423 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:44,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:44,507 INFO L93 Difference]: Finished difference Result 245 states and 511 transitions. [2021-07-09 17:29:44,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:29:44,507 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:44,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:44,508 INFO L225 Difference]: With dead ends: 245 [2021-07-09 17:29:44,508 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 17:29:44,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 832.4ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:29:44,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 17:29:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 190. [2021-07-09 17:29:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.259259259259259) internal successors, (427), 189 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 427 transitions. [2021-07-09 17:29:44,510 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 427 transitions. Word has length 18 [2021-07-09 17:29:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:44,510 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 427 transitions. [2021-07-09 17:29:44,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 427 transitions. [2021-07-09 17:29:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:44,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:44,510 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:44,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1739,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:44,711 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:44,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:44,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1846651190, now seen corresponding path program 224 times [2021-07-09 17:29:44,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:44,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026198468] [2021-07-09 17:29:44,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:44,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:44,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026198468] [2021-07-09 17:29:44,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026198468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:44,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404764878] [2021-07-09 17:29:44,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:44,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:44,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:44,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:44,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:45,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404764878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:45,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:45,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:45,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569815105] [2021-07-09 17:29:45,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:45,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:45,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:45,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:45,239 INFO L87 Difference]: Start difference. First operand 190 states and 427 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:45,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:45,837 INFO L93 Difference]: Finished difference Result 266 states and 546 transitions. [2021-07-09 17:29:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:29:45,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:45,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:45,838 INFO L225 Difference]: With dead ends: 266 [2021-07-09 17:29:45,838 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:29:45,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 802.1ms TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:29:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:29:45,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 189. [2021-07-09 17:29:45,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.2606382978723403) internal successors, (425), 188 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 425 transitions. [2021-07-09 17:29:45,840 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 425 transitions. Word has length 18 [2021-07-09 17:29:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:45,840 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 425 transitions. [2021-07-09 17:29:45,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 425 transitions. [2021-07-09 17:29:45,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:45,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:45,841 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:46,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-07-09 17:29:46,041 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:46,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:46,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1340304924, now seen corresponding path program 225 times [2021-07-09 17:29:46,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:46,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291932545] [2021-07-09 17:29:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:46,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:46,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291932545] [2021-07-09 17:29:46,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291932545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:46,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540071486] [2021-07-09 17:29:46,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:46,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:29:46,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:46,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:46,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:46,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540071486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:46,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:46,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:46,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130853599] [2021-07-09 17:29:46,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:46,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:46,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:46,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:46,526 INFO L87 Difference]: Start difference. First operand 189 states and 425 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:47,151 INFO L93 Difference]: Finished difference Result 270 states and 554 transitions. [2021-07-09 17:29:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:29:47,151 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:47,151 INFO L225 Difference]: With dead ends: 270 [2021-07-09 17:29:47,151 INFO L226 Difference]: Without dead ends: 235 [2021-07-09 17:29:47,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 762.6ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:29:47,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-09 17:29:47,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 188. [2021-07-09 17:29:47,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2620320855614975) internal successors, (423), 187 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:47,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 423 transitions. [2021-07-09 17:29:47,153 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 423 transitions. Word has length 18 [2021-07-09 17:29:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:47,154 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 423 transitions. [2021-07-09 17:29:47,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:47,154 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 423 transitions. [2021-07-09 17:29:47,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:47,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:47,154 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:47,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-07-09 17:29:47,354 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:47,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:47,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1375929764, now seen corresponding path program 226 times [2021-07-09 17:29:47,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:47,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811193733] [2021-07-09 17:29:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:47,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:47,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811193733] [2021-07-09 17:29:47,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811193733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:47,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288526721] [2021-07-09 17:29:47,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:47,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:47,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:47,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:47,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:47,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288526721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:47,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:47,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:47,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015611746] [2021-07-09 17:29:47,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:47,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:47,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:47,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:47,905 INFO L87 Difference]: Start difference. First operand 188 states and 423 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:49,021 INFO L93 Difference]: Finished difference Result 265 states and 542 transitions. [2021-07-09 17:29:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:29:49,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:49,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:49,022 INFO L225 Difference]: With dead ends: 265 [2021-07-09 17:29:49,022 INFO L226 Difference]: Without dead ends: 233 [2021-07-09 17:29:49,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1277.9ms TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:29:49,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-07-09 17:29:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 188. [2021-07-09 17:29:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2566844919786098) internal successors, (422), 187 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 422 transitions. [2021-07-09 17:29:49,024 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 422 transitions. Word has length 18 [2021-07-09 17:29:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:49,024 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 422 transitions. [2021-07-09 17:29:49,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 422 transitions. [2021-07-09 17:29:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:49,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:49,025 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:49,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1771 [2021-07-09 17:29:49,225 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:49,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:49,225 INFO L82 PathProgramCache]: Analyzing trace with hash -579194012, now seen corresponding path program 227 times [2021-07-09 17:29:49,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:49,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225170708] [2021-07-09 17:29:49,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:49,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:49,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225170708] [2021-07-09 17:29:49,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225170708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:49,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728404699] [2021-07-09 17:29:49,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:49,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:29:49,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:49,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:49,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:49,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728404699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:49,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:49,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:49,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603910341] [2021-07-09 17:29:49,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:49,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:49,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:49,769 INFO L87 Difference]: Start difference. First operand 188 states and 422 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:50,332 INFO L93 Difference]: Finished difference Result 267 states and 547 transitions. [2021-07-09 17:29:50,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:29:50,333 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:50,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:50,333 INFO L225 Difference]: With dead ends: 267 [2021-07-09 17:29:50,333 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:29:50,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 692.3ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:50,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:29:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 188. [2021-07-09 17:29:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2566844919786098) internal successors, (422), 187 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 422 transitions. [2021-07-09 17:29:50,335 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 422 transitions. Word has length 18 [2021-07-09 17:29:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:50,335 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 422 transitions. [2021-07-09 17:29:50,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:50,335 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 422 transitions. [2021-07-09 17:29:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:50,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:50,336 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:50,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1784,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:50,536 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:50,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:50,536 INFO L82 PathProgramCache]: Analyzing trace with hash -72847746, now seen corresponding path program 228 times [2021-07-09 17:29:50,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:50,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343297275] [2021-07-09 17:29:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:50,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:50,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343297275] [2021-07-09 17:29:50,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343297275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:50,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031360281] [2021-07-09 17:29:50,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:50,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:29:50,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:50,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:50,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:51,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031360281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:51,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:51,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:51,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646610879] [2021-07-09 17:29:51,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:51,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:51,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:51,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:51,117 INFO L87 Difference]: Start difference. First operand 188 states and 422 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:52,133 INFO L93 Difference]: Finished difference Result 305 states and 613 transitions. [2021-07-09 17:29:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:29:52,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:52,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:52,134 INFO L225 Difference]: With dead ends: 305 [2021-07-09 17:29:52,134 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:29:52,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1217.9ms TimeCoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:29:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:29:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 192. [2021-07-09 17:29:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.261780104712042) internal successors, (432), 191 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 432 transitions. [2021-07-09 17:29:52,137 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 432 transitions. Word has length 18 [2021-07-09 17:29:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:52,137 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 432 transitions. [2021-07-09 17:29:52,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 432 transitions. [2021-07-09 17:29:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:52,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:52,137 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:52,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-07-09 17:29:52,338 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:52,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:52,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1555982684, now seen corresponding path program 229 times [2021-07-09 17:29:52,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:52,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000909649] [2021-07-09 17:29:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:52,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:52,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000909649] [2021-07-09 17:29:52,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000909649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:52,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072808666] [2021-07-09 17:29:52,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:52,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:52,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:52,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072808666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:52,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:52,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:29:52,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158742422] [2021-07-09 17:29:52,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:29:52,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:52,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:29:52,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:52,844 INFO L87 Difference]: Start difference. First operand 192 states and 432 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:54,070 INFO L93 Difference]: Finished difference Result 288 states and 593 transitions. [2021-07-09 17:29:54,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:29:54,071 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:54,071 INFO L225 Difference]: With dead ends: 288 [2021-07-09 17:29:54,071 INFO L226 Difference]: Without dead ends: 250 [2021-07-09 17:29:54,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1316.4ms TimeCoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:29:54,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-09 17:29:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 193. [2021-07-09 17:29:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.2604166666666665) internal successors, (434), 192 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 434 transitions. [2021-07-09 17:29:54,073 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 434 transitions. Word has length 18 [2021-07-09 17:29:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:54,073 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 434 transitions. [2021-07-09 17:29:54,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 434 transitions. [2021-07-09 17:29:54,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:54,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:54,074 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:54,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-07-09 17:29:54,274 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:54,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:54,274 INFO L82 PathProgramCache]: Analyzing trace with hash 179489888, now seen corresponding path program 230 times [2021-07-09 17:29:54,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:54,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783760307] [2021-07-09 17:29:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:54,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:54,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783760307] [2021-07-09 17:29:54,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783760307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:54,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887497172] [2021-07-09 17:29:54,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:54,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:54,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:54,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:54,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:54,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887497172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:54,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:54,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:54,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222242763] [2021-07-09 17:29:54,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:54,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:54,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:54,804 INFO L87 Difference]: Start difference. First operand 193 states and 434 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:54,987 INFO L93 Difference]: Finished difference Result 213 states and 463 transitions. [2021-07-09 17:29:54,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:29:54,987 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:54,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:54,988 INFO L225 Difference]: With dead ends: 213 [2021-07-09 17:29:54,988 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:29:54,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 475.6ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:29:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:29:54,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2021-07-09 17:29:54,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.2590673575129534) internal successors, (436), 193 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 436 transitions. [2021-07-09 17:29:54,990 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 436 transitions. Word has length 18 [2021-07-09 17:29:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:54,990 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 436 transitions. [2021-07-09 17:29:54,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:54,990 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 436 transitions. [2021-07-09 17:29:54,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:54,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:54,990 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:55,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1818,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:55,206 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:55,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:55,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1397851842, now seen corresponding path program 231 times [2021-07-09 17:29:55,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:55,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511348748] [2021-07-09 17:29:55,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:55,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:55,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511348748] [2021-07-09 17:29:55,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511348748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:55,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683953478] [2021-07-09 17:29:55,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:55,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:29:55,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:55,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:29:55,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:55,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683953478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:55,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:55,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:55,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206830522] [2021-07-09 17:29:55,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:55,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:55,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:55,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:55,800 INFO L87 Difference]: Start difference. First operand 194 states and 436 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:56,171 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-07-09 17:29:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:56,918 INFO L93 Difference]: Finished difference Result 277 states and 570 transitions. [2021-07-09 17:29:56,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:29:56,918 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:56,918 INFO L225 Difference]: With dead ends: 277 [2021-07-09 17:29:56,919 INFO L226 Difference]: Without dead ends: 259 [2021-07-09 17:29:56,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1380.2ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:29:56,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-07-09 17:29:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 196. [2021-07-09 17:29:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.2666666666666666) internal successors, (442), 195 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 442 transitions. [2021-07-09 17:29:56,921 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 442 transitions. Word has length 18 [2021-07-09 17:29:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:56,921 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 442 transitions. [2021-07-09 17:29:56,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:56,921 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 442 transitions. [2021-07-09 17:29:56,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:56,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:56,921 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:57,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:57,122 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:57,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:57,122 INFO L82 PathProgramCache]: Analyzing trace with hash -63260512, now seen corresponding path program 232 times [2021-07-09 17:29:57,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:57,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652517897] [2021-07-09 17:29:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:57,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:57,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652517897] [2021-07-09 17:29:57,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652517897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:57,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740329821] [2021-07-09 17:29:57,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:57,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:57,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:57,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:29:57,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:57,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740329821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:57,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:57,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:29:57,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788997849] [2021-07-09 17:29:57,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:29:57,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:57,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:29:57,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:29:57,656 INFO L87 Difference]: Start difference. First operand 196 states and 442 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,295 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-07-09 17:29:58,468 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-09 17:29:58,699 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-07-09 17:29:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:58,860 INFO L93 Difference]: Finished difference Result 271 states and 568 transitions. [2021-07-09 17:29:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:29:58,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:58,861 INFO L225 Difference]: With dead ends: 271 [2021-07-09 17:29:58,861 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:29:58,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1338.5ms TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:29:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:29:58,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-07-09 17:29:58,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.2653061224489797) internal successors, (444), 196 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 444 transitions. [2021-07-09 17:29:58,863 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 444 transitions. Word has length 18 [2021-07-09 17:29:58,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:58,863 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 444 transitions. [2021-07-09 17:29:58,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 444 transitions. [2021-07-09 17:29:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:58,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:58,864 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:59,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1840 [2021-07-09 17:29:59,064 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:59,065 INFO L82 PathProgramCache]: Analyzing trace with hash -684310339, now seen corresponding path program 233 times [2021-07-09 17:29:59,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:59,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113644855] [2021-07-09 17:29:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:59,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:59,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113644855] [2021-07-09 17:29:59,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113644855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856687974] [2021-07-09 17:29:59,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:59,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:29:59,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:59,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:29:59,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:59,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856687974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:59,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 17:29:59,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412200737] [2021-07-09 17:29:59,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:29:59,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:59,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:29:59,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:29:59,314 INFO L87 Difference]: Start difference. First operand 197 states and 444 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:59,529 INFO L93 Difference]: Finished difference Result 227 states and 502 transitions. [2021-07-09 17:29:59,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:29:59,530 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:29:59,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:59,530 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:29:59,530 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:29:59,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:29:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:29:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 196. [2021-07-09 17:29:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.2666666666666666) internal successors, (442), 195 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 442 transitions. [2021-07-09 17:29:59,533 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 442 transitions. Word has length 18 [2021-07-09 17:29:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:59,533 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 442 transitions. [2021-07-09 17:29:59,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 442 transitions. [2021-07-09 17:29:59,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:29:59,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:59,534 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:59,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1850 [2021-07-09 17:29:59,734 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:59,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:59,735 INFO L82 PathProgramCache]: Analyzing trace with hash -891505576, now seen corresponding path program 234 times [2021-07-09 17:29:59,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:59,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987941492] [2021-07-09 17:29:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:59,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:59,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987941492] [2021-07-09 17:29:59,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987941492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013502192] [2021-07-09 17:29:59,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:59,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:29:59,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:59,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:29:59,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:00,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013502192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:00,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:00,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:30:00,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494341107] [2021-07-09 17:30:00,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:30:00,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:00,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:30:00,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:00,347 INFO L87 Difference]: Start difference. First operand 196 states and 442 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:00,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:01,000 INFO L93 Difference]: Finished difference Result 249 states and 526 transitions. [2021-07-09 17:30:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:01,000 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:01,000 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:30:01,000 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:30:01,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 929.0ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:30:01,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:30:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 197. [2021-07-09 17:30:01,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.2653061224489797) internal successors, (444), 196 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 444 transitions. [2021-07-09 17:30:01,002 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 444 transitions. Word has length 18 [2021-07-09 17:30:01,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:01,003 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 444 transitions. [2021-07-09 17:30:01,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 444 transitions. [2021-07-09 17:30:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:01,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:01,003 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:01,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1855 [2021-07-09 17:30:01,204 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:01,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:01,204 INFO L82 PathProgramCache]: Analyzing trace with hash -94769824, now seen corresponding path program 235 times [2021-07-09 17:30:01,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:01,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777689840] [2021-07-09 17:30:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:01,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:01,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777689840] [2021-07-09 17:30:01,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777689840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:01,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866038047] [2021-07-09 17:30:01,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:01,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:30:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:01,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866038047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:01,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:01,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:30:01,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763332963] [2021-07-09 17:30:01,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:30:01,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:01,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:30:01,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:01,702 INFO L87 Difference]: Start difference. First operand 197 states and 444 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:02,434 INFO L93 Difference]: Finished difference Result 248 states and 531 transitions. [2021-07-09 17:30:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:02,435 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:02,435 INFO L225 Difference]: With dead ends: 248 [2021-07-09 17:30:02,435 INFO L226 Difference]: Without dead ends: 214 [2021-07-09 17:30:02,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 858.6ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:30:02,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-09 17:30:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 194. [2021-07-09 17:30:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.2590673575129534) internal successors, (436), 193 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 436 transitions. [2021-07-09 17:30:02,437 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 436 transitions. Word has length 18 [2021-07-09 17:30:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:02,437 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 436 transitions. [2021-07-09 17:30:02,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 436 transitions. [2021-07-09 17:30:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:02,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:02,438 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:02,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1866,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:02,638 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1920326782, now seen corresponding path program 236 times [2021-07-09 17:30:02,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:02,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106569658] [2021-07-09 17:30:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:02,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:02,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106569658] [2021-07-09 17:30:02,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106569658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:02,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880563250] [2021-07-09 17:30:02,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:02,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:02,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:02,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:30:02,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:03,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880563250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:03,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:03,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:30:03,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067785609] [2021-07-09 17:30:03,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:30:03,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:03,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:30:03,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:03,238 INFO L87 Difference]: Start difference. First operand 194 states and 436 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:04,155 INFO L93 Difference]: Finished difference Result 245 states and 524 transitions. [2021-07-09 17:30:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:04,156 INFO L225 Difference]: With dead ends: 245 [2021-07-09 17:30:04,156 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:30:04,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1115.1ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:30:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:30:04,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 197. [2021-07-09 17:30:04,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-07-09 17:30:04,159 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-07-09 17:30:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:04,159 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-07-09 17:30:04,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-07-09 17:30:04,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:04,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:04,160 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:04,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1876 [2021-07-09 17:30:04,360 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:04,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:04,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1040049184, now seen corresponding path program 237 times [2021-07-09 17:30:04,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:04,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950254968] [2021-07-09 17:30:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:04,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:04,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950254968] [2021-07-09 17:30:04,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950254968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:04,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995362166] [2021-07-09 17:30:04,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:04,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:30:04,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:04,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:30:04,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:04,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995362166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:04,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:04,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:30:04,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077633529] [2021-07-09 17:30:04,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:30:04,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:04,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:30:04,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:04,931 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:05,619 INFO L93 Difference]: Finished difference Result 269 states and 557 transitions. [2021-07-09 17:30:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:05,619 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:05,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:05,619 INFO L225 Difference]: With dead ends: 269 [2021-07-09 17:30:05,619 INFO L226 Difference]: Without dead ends: 250 [2021-07-09 17:30:05,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 886.4ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-09 17:30:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 197. [2021-07-09 17:30:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-07-09 17:30:05,622 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-07-09 17:30:05,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:05,622 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-07-09 17:30:05,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,622 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-07-09 17:30:05,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:05,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:05,622 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:05,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1889,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:05,823 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:05,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1577904762, now seen corresponding path program 238 times [2021-07-09 17:30:05,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:05,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538778717] [2021-07-09 17:30:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:05,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:05,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538778717] [2021-07-09 17:30:05,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538778717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:05,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161884935] [2021-07-09 17:30:05,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:06,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:06,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:06,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:30:06,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:06,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161884935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:06,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:06,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:30:06,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737668539] [2021-07-09 17:30:06,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:30:06,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:06,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:30:06,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:06,302 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:07,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:07,016 INFO L93 Difference]: Finished difference Result 264 states and 561 transitions. [2021-07-09 17:30:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:07,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:07,017 INFO L225 Difference]: With dead ends: 264 [2021-07-09 17:30:07,018 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:30:07,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 812.4ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:30:07,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:30:07,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 197. [2021-07-09 17:30:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-07-09 17:30:07,021 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-07-09 17:30:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:07,021 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-07-09 17:30:07,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-07-09 17:30:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:07,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:07,021 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:07,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1902,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:07,222 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:07,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:07,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1071558496, now seen corresponding path program 239 times [2021-07-09 17:30:07,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:07,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857895644] [2021-07-09 17:30:07,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:07,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857895644] [2021-07-09 17:30:07,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857895644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319033683] [2021-07-09 17:30:07,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:07,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:07,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:07,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:30:07,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:07,684 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 17:30:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:07,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319033683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:07,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:07,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:30:07,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125848206] [2021-07-09 17:30:07,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:30:07,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:07,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:30:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:07,885 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:08,415 INFO L93 Difference]: Finished difference Result 262 states and 553 transitions. [2021-07-09 17:30:08,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:30:08,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:08,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:08,415 INFO L225 Difference]: With dead ends: 262 [2021-07-09 17:30:08,416 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 17:30:08,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 824.8ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:30:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 17:30:08,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 197. [2021-07-09 17:30:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-07-09 17:30:08,418 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-07-09 17:30:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:08,418 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-07-09 17:30:08,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:08,418 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-07-09 17:30:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:08,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:08,418 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:08,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1912 [2021-07-09 17:30:08,619 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:08,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1107183336, now seen corresponding path program 240 times [2021-07-09 17:30:08,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:08,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028290623] [2021-07-09 17:30:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:08,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:08,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028290623] [2021-07-09 17:30:08,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028290623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:08,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580620893] [2021-07-09 17:30:08,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:08,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:30:08,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:08,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 17:30:08,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:09,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580620893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:09,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:09,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:30:09,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309832987] [2021-07-09 17:30:09,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:30:09,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:09,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:30:09,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:09,160 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:10,231 INFO L93 Difference]: Finished difference Result 290 states and 589 transitions. [2021-07-09 17:30:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:30:10,232 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:10,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:10,232 INFO L225 Difference]: With dead ends: 290 [2021-07-09 17:30:10,232 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:30:10,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1207.4ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:30:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:30:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 200. [2021-07-09 17:30:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.2562814070351758) internal successors, (449), 199 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 449 transitions. [2021-07-09 17:30:10,234 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 449 transitions. Word has length 18 [2021-07-09 17:30:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:10,234 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 449 transitions. [2021-07-09 17:30:10,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 449 transitions. [2021-07-09 17:30:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:10,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:10,235 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:10,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1924,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:10,436 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:10,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:10,436 INFO L82 PathProgramCache]: Analyzing trace with hash -310447584, now seen corresponding path program 241 times [2021-07-09 17:30:10,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:10,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612933421] [2021-07-09 17:30:10,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:10,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:10,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612933421] [2021-07-09 17:30:10,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612933421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:10,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397196465] [2021-07-09 17:30:10,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:10,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:30:10,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:10,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397196465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:10,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:10,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:30:10,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669387794] [2021-07-09 17:30:10,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:30:10,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:10,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:30:10,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:10,854 INFO L87 Difference]: Start difference. First operand 200 states and 449 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:11,613 INFO L93 Difference]: Finished difference Result 244 states and 526 transitions. [2021-07-09 17:30:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:30:11,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:11,613 INFO L225 Difference]: With dead ends: 244 [2021-07-09 17:30:11,613 INFO L226 Difference]: Without dead ends: 219 [2021-07-09 17:30:11,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 803.9ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:30:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-09 17:30:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 200. [2021-07-09 17:30:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.2562814070351758) internal successors, (449), 199 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 449 transitions. [2021-07-09 17:30:11,615 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 449 transitions. Word has length 18 [2021-07-09 17:30:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:11,616 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 449 transitions. [2021-07-09 17:30:11,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:11,616 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 449 transitions. [2021-07-09 17:30:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:11,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:11,616 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:11,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1935,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:11,816 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:11,817 INFO L82 PathProgramCache]: Analyzing trace with hash 195898682, now seen corresponding path program 242 times [2021-07-09 17:30:11,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:11,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059406904] [2021-07-09 17:30:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:12,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:12,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059406904] [2021-07-09 17:30:12,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059406904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:12,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335137080] [2021-07-09 17:30:12,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:12,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:12,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:12,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:30:12,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:12,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335137080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:12,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:12,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:30:12,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972956462] [2021-07-09 17:30:12,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:30:12,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:12,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:30:12,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:12,418 INFO L87 Difference]: Start difference. First operand 200 states and 449 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:13,393 INFO L93 Difference]: Finished difference Result 260 states and 563 transitions. [2021-07-09 17:30:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:30:13,393 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:13,394 INFO L225 Difference]: With dead ends: 260 [2021-07-09 17:30:13,394 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 17:30:13,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1225.2ms TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:30:13,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 17:30:13,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 205. [2021-07-09 17:30:13,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2745098039215685) internal successors, (464), 204 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 464 transitions. [2021-07-09 17:30:13,396 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 464 transitions. Word has length 18 [2021-07-09 17:30:13,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:13,396 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 464 transitions. [2021-07-09 17:30:13,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:13,396 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 464 transitions. [2021-07-09 17:30:13,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:13,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:13,396 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:13,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1945 [2021-07-09 17:30:13,597 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:13,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:13,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1287236256, now seen corresponding path program 243 times [2021-07-09 17:30:13,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:13,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781972771] [2021-07-09 17:30:13,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:13,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:13,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781972771] [2021-07-09 17:30:13,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781972771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:13,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469660918] [2021-07-09 17:30:13,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:13,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:30:13,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:13,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:30:13,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:14,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469660918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:14,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:14,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:30:14,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112053992] [2021-07-09 17:30:14,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:30:14,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:14,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:30:14,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:14,208 INFO L87 Difference]: Start difference. First operand 205 states and 464 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:15,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:15,129 INFO L93 Difference]: Finished difference Result 280 states and 598 transitions. [2021-07-09 17:30:15,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:30:15,130 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:15,130 INFO L225 Difference]: With dead ends: 280 [2021-07-09 17:30:15,130 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:30:15,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1100.2ms TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:30:15,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:30:15,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 209. [2021-07-09 17:30:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.269230769230769) internal successors, (472), 208 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 472 transitions. [2021-07-09 17:30:15,133 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 472 transitions. Word has length 18 [2021-07-09 17:30:15,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:15,133 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 472 transitions. [2021-07-09 17:30:15,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:15,133 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 472 transitions. [2021-07-09 17:30:15,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:15,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:15,133 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:15,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:15,345 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:15,345 INFO L82 PathProgramCache]: Analyzing trace with hash -682872100, now seen corresponding path program 244 times [2021-07-09 17:30:15,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:15,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035595007] [2021-07-09 17:30:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:15,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:15,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035595007] [2021-07-09 17:30:15,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035595007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:15,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407052423] [2021-07-09 17:30:15,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:15,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:15,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:15,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:30:15,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:15,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407052423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:15,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:15,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:30:15,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747892085] [2021-07-09 17:30:15,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:30:15,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:15,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:30:15,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:15,899 INFO L87 Difference]: Start difference. First operand 209 states and 472 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:16,671 INFO L93 Difference]: Finished difference Result 314 states and 641 transitions. [2021-07-09 17:30:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:30:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:16,672 INFO L225 Difference]: With dead ends: 314 [2021-07-09 17:30:16,672 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 17:30:16,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 972.7ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:30:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 17:30:16,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 210. [2021-07-09 17:30:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.272727272727273) internal successors, (475), 209 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 475 transitions. [2021-07-09 17:30:16,674 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 475 transitions. Word has length 18 [2021-07-09 17:30:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:16,674 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 475 transitions. [2021-07-09 17:30:16,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,675 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 475 transitions. [2021-07-09 17:30:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:16,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:16,675 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:16,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1968 [2021-07-09 17:30:16,875 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:16,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:16,876 INFO L82 PathProgramCache]: Analyzing trace with hash 113863652, now seen corresponding path program 245 times [2021-07-09 17:30:16,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:16,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493751861] [2021-07-09 17:30:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:17,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:17,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493751861] [2021-07-09 17:30:17,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493751861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:17,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927439640] [2021-07-09 17:30:17,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:17,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:17,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:17,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:30:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:17,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927439640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:17,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:17,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:30:17,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452522586] [2021-07-09 17:30:17,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:30:17,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:17,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:30:17,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:17,434 INFO L87 Difference]: Start difference. First operand 210 states and 475 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:17,955 INFO L93 Difference]: Finished difference Result 298 states and 626 transitions. [2021-07-09 17:30:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:17,955 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:17,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:17,955 INFO L225 Difference]: With dead ends: 298 [2021-07-09 17:30:17,955 INFO L226 Difference]: Without dead ends: 269 [2021-07-09 17:30:17,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 735.9ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:30:17,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-07-09 17:30:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 212. [2021-07-09 17:30:17,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2701421800947865) internal successors, (479), 211 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:17,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 479 transitions. [2021-07-09 17:30:17,958 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 479 transitions. Word has length 18 [2021-07-09 17:30:17,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:17,958 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 479 transitions. [2021-07-09 17:30:17,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:17,958 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 479 transitions. [2021-07-09 17:30:17,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:17,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:17,958 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:18,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1981,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:18,159 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash 620209918, now seen corresponding path program 246 times [2021-07-09 17:30:18,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:18,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980595323] [2021-07-09 17:30:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:18,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:18,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980595323] [2021-07-09 17:30:18,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980595323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:18,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926002486] [2021-07-09 17:30:18,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:18,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:30:18,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:18,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 17:30:18,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:18,539 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 17:30:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:18,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926002486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:18,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:18,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:30:18,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886925274] [2021-07-09 17:30:18,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:30:18,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:18,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:30:18,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:18,732 INFO L87 Difference]: Start difference. First operand 212 states and 479 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:19,360 INFO L93 Difference]: Finished difference Result 289 states and 611 transitions. [2021-07-09 17:30:19,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:19,360 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:19,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:19,361 INFO L225 Difference]: With dead ends: 289 [2021-07-09 17:30:19,361 INFO L226 Difference]: Without dead ends: 251 [2021-07-09 17:30:19,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 803.4ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-09 17:30:19,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 213. [2021-07-09 17:30:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.268867924528302) internal successors, (481), 212 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 481 transitions. [2021-07-09 17:30:19,363 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 481 transitions. Word has length 18 [2021-07-09 17:30:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:19,363 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 481 transitions. [2021-07-09 17:30:19,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:19,363 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 481 transitions. [2021-07-09 17:30:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:19,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:19,363 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:19,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1993 [2021-07-09 17:30:19,570 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:19,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:19,571 INFO L82 PathProgramCache]: Analyzing trace with hash -862925020, now seen corresponding path program 247 times [2021-07-09 17:30:19,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:19,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28267874] [2021-07-09 17:30:19,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:19,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:19,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28267874] [2021-07-09 17:30:19,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28267874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:19,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613788441] [2021-07-09 17:30:19,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:19,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:30:19,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:20,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613788441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:20,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:20,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:30:20,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439079449] [2021-07-09 17:30:20,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:30:20,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:20,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:30:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:20,131 INFO L87 Difference]: Start difference. First operand 213 states and 481 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:21,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:21,330 INFO L93 Difference]: Finished difference Result 327 states and 687 transitions. [2021-07-09 17:30:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:30:21,330 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:21,331 INFO L225 Difference]: With dead ends: 327 [2021-07-09 17:30:21,331 INFO L226 Difference]: Without dead ends: 308 [2021-07-09 17:30:21,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1319.8ms TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:30:21,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-09 17:30:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 213. [2021-07-09 17:30:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.268867924528302) internal successors, (481), 212 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:21,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 481 transitions. [2021-07-09 17:30:21,333 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 481 transitions. Word has length 18 [2021-07-09 17:30:21,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:21,333 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 481 transitions. [2021-07-09 17:30:21,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 481 transitions. [2021-07-09 17:30:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:30:21,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:21,334 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:21,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2005,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:21,534 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:21,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash -17953568, now seen corresponding path program 248 times [2021-07-09 17:30:21,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:21,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457489954] [2021-07-09 17:30:21,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:21,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:21,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457489954] [2021-07-09 17:30:21,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457489954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:21,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334451757] [2021-07-09 17:30:21,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:21,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:21,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:21,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:30:21,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:22,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334451757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:22,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:22,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:30:22,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767246562] [2021-07-09 17:30:22,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:30:22,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:22,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:30:22,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:22,046 INFO L87 Difference]: Start difference. First operand 213 states and 481 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:22,734 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-07-09 17:30:23,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:23,575 INFO L93 Difference]: Finished difference Result 333 states and 693 transitions. [2021-07-09 17:30:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:30:23,575 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:30:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:23,576 INFO L225 Difference]: With dead ends: 333 [2021-07-09 17:30:23,576 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 17:30:23,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1561.5ms TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:30:23,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 17:30:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 215. [2021-07-09 17:30:23,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2663551401869158) internal successors, (485), 214 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 485 transitions. [2021-07-09 17:30:23,578 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 485 transitions. Word has length 18 [2021-07-09 17:30:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:23,578 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 485 transitions. [2021-07-09 17:30:23,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 485 transitions. [2021-07-09 17:30:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:23,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:23,579 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:23,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2015 [2021-07-09 17:30:23,782 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:23,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:23,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1401880791, now seen corresponding path program 249 times [2021-07-09 17:30:23,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:23,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44318880] [2021-07-09 17:30:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:23,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:23,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44318880] [2021-07-09 17:30:23,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44318880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:23,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628923385] [2021-07-09 17:30:23,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:23,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:23,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:23,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:30:23,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:24,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628923385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:24,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:24,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:24,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685868004] [2021-07-09 17:30:24,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:24,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:24,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:24,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:24,101 INFO L87 Difference]: Start difference. First operand 215 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:24,373 INFO L93 Difference]: Finished difference Result 278 states and 600 transitions. [2021-07-09 17:30:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:24,375 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:24,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:24,375 INFO L225 Difference]: With dead ends: 278 [2021-07-09 17:30:24,375 INFO L226 Difference]: Without dead ends: 278 [2021-07-09 17:30:24,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-09 17:30:24,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 218. [2021-07-09 17:30:24,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.262672811059908) internal successors, (491), 217 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-07-09 17:30:24,377 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-07-09 17:30:24,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:24,379 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-07-09 17:30:24,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-07-09 17:30:24,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:24,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:24,379 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:24,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2025 [2021-07-09 17:30:24,586 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:24,586 INFO L82 PathProgramCache]: Analyzing trace with hash 357408349, now seen corresponding path program 250 times [2021-07-09 17:30:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:24,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147077404] [2021-07-09 17:30:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:24,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:24,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147077404] [2021-07-09 17:30:24,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147077404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:24,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134945317] [2021-07-09 17:30:24,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:24,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:24,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:24,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:24,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:24,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134945317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:24,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:24,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:24,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338394874] [2021-07-09 17:30:24,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:24,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:24,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:24,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:24,896 INFO L87 Difference]: Start difference. First operand 218 states and 491 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:25,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:25,432 INFO L93 Difference]: Finished difference Result 289 states and 622 transitions. [2021-07-09 17:30:25,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:25,432 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:25,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:25,432 INFO L225 Difference]: With dead ends: 289 [2021-07-09 17:30:25,432 INFO L226 Difference]: Without dead ends: 289 [2021-07-09 17:30:25,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 579.5ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:30:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-07-09 17:30:25,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 218. [2021-07-09 17:30:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.262672811059908) internal successors, (491), 217 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-07-09 17:30:25,435 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-07-09 17:30:25,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:25,435 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-07-09 17:30:25,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-07-09 17:30:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:25,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:25,435 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:25,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2029 [2021-07-09 17:30:25,636 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:25,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:25,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1516287333, now seen corresponding path program 251 times [2021-07-09 17:30:25,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:25,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455468454] [2021-07-09 17:30:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:25,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:25,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455468454] [2021-07-09 17:30:25,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455468454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:25,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972984349] [2021-07-09 17:30:25,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:25,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:30:25,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:25,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:25,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:25,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972984349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:25,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:25,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:25,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693490913] [2021-07-09 17:30:25,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:25,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:25,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:25,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:25,960 INFO L87 Difference]: Start difference. First operand 218 states and 491 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:26,509 INFO L93 Difference]: Finished difference Result 286 states and 616 transitions. [2021-07-09 17:30:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:30:26,509 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:26,510 INFO L225 Difference]: With dead ends: 286 [2021-07-09 17:30:26,510 INFO L226 Difference]: Without dead ends: 286 [2021-07-09 17:30:26,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 607.7ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:30:26,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-09 17:30:26,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 218. [2021-07-09 17:30:26,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.262672811059908) internal successors, (491), 217 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-07-09 17:30:26,512 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-07-09 17:30:26,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:26,512 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-07-09 17:30:26,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-07-09 17:30:26,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:26,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:26,513 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:26,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2034 [2021-07-09 17:30:26,713 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:26,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:26,713 INFO L82 PathProgramCache]: Analyzing trace with hash 445291869, now seen corresponding path program 252 times [2021-07-09 17:30:26,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:26,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114589849] [2021-07-09 17:30:26,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:26,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:26,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114589849] [2021-07-09 17:30:26,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114589849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:26,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880439194] [2021-07-09 17:30:26,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:26,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:26,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:26,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:27,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880439194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:27,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:27,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:27,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430922108] [2021-07-09 17:30:27,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:27,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:27,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:27,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:27,039 INFO L87 Difference]: Start difference. First operand 218 states and 491 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:27,618 INFO L93 Difference]: Finished difference Result 284 states and 612 transitions. [2021-07-09 17:30:27,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:30:27,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:27,619 INFO L225 Difference]: With dead ends: 284 [2021-07-09 17:30:27,619 INFO L226 Difference]: Without dead ends: 284 [2021-07-09 17:30:27,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 621.3ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:30:27,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-09 17:30:27,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 219. [2021-07-09 17:30:27,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.261467889908257) internal successors, (493), 218 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 493 transitions. [2021-07-09 17:30:27,622 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 493 transitions. Word has length 19 [2021-07-09 17:30:27,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:27,622 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 493 transitions. [2021-07-09 17:30:27,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:27,622 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 493 transitions. [2021-07-09 17:30:27,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:27,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:27,622 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:27,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2039 [2021-07-09 17:30:27,823 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:27,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:27,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1242027621, now seen corresponding path program 253 times [2021-07-09 17:30:27,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:27,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661193573] [2021-07-09 17:30:27,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:27,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:27,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661193573] [2021-07-09 17:30:27,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661193573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:27,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032415520] [2021-07-09 17:30:27,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:27,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:27,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:28,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032415520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:28,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:28,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:28,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852212672] [2021-07-09 17:30:28,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:28,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:28,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:28,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:28,142 INFO L87 Difference]: Start difference. First operand 219 states and 493 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:28,837 INFO L93 Difference]: Finished difference Result 285 states and 611 transitions. [2021-07-09 17:30:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:30:28,838 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:28,838 INFO L225 Difference]: With dead ends: 285 [2021-07-09 17:30:28,838 INFO L226 Difference]: Without dead ends: 282 [2021-07-09 17:30:28,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 697.2ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:30:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-07-09 17:30:28,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 220. [2021-07-09 17:30:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-09 17:30:28,841 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-09 17:30:28,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:28,841 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-09 17:30:28,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-09 17:30:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:28,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:28,841 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:29,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2044,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:29,042 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:29,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:29,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1925543582, now seen corresponding path program 254 times [2021-07-09 17:30:29,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:29,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661473834] [2021-07-09 17:30:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:29,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:29,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661473834] [2021-07-09 17:30:29,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661473834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:29,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818373618] [2021-07-09 17:30:29,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:29,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:29,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:29,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:29,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818373618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:29,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:29,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:29,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502360766] [2021-07-09 17:30:29,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:29,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:29,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:29,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:29,406 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:29,890 INFO L93 Difference]: Finished difference Result 267 states and 578 transitions. [2021-07-09 17:30:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:30:29,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:29,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:29,890 INFO L225 Difference]: With dead ends: 267 [2021-07-09 17:30:29,891 INFO L226 Difference]: Without dead ends: 267 [2021-07-09 17:30:29,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 623.8ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-07-09 17:30:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 220. [2021-07-09 17:30:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-09 17:30:29,893 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-09 17:30:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:29,893 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-09 17:30:29,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:29,893 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-09 17:30:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:29,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:29,893 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:30,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:30,094 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:30,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:30,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1418186439, now seen corresponding path program 255 times [2021-07-09 17:30:30,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:30,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818601191] [2021-07-09 17:30:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:30,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:30,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818601191] [2021-07-09 17:30:30,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818601191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:30,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311984053] [2021-07-09 17:30:30,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:30,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:30:30,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:30,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:30:30,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:30,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311984053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:30,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:30,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:30,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583603429] [2021-07-09 17:30:30,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:30,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:30,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:30,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:30,381 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:30,711 INFO L93 Difference]: Finished difference Result 252 states and 555 transitions. [2021-07-09 17:30:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:30,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:30,712 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:30:30,712 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:30:30,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:30:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:30:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 220. [2021-07-09 17:30:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:30,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-09 17:30:30,714 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-09 17:30:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:30,714 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-09 17:30:30,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-09 17:30:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:30,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:30,715 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:30,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2059,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:30,915 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:30,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:30,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1717901873, now seen corresponding path program 256 times [2021-07-09 17:30:30,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:30,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166997129] [2021-07-09 17:30:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:31,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:31,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166997129] [2021-07-09 17:30:31,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166997129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:31,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940354822] [2021-07-09 17:30:31,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:31,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:31,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:31,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:31,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:31,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940354822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:31,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:31,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:31,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955761742] [2021-07-09 17:30:31,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:31,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:31,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:31,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:31,233 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:31,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:31,567 INFO L93 Difference]: Finished difference Result 264 states and 579 transitions. [2021-07-09 17:30:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:31,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:31,568 INFO L225 Difference]: With dead ends: 264 [2021-07-09 17:30:31,568 INFO L226 Difference]: Without dead ends: 264 [2021-07-09 17:30:31,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:31,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-09 17:30:31,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 220. [2021-07-09 17:30:31,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:31,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-09 17:30:31,571 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-09 17:30:31,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:31,571 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-09 17:30:31,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:31,571 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-09 17:30:31,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:31,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:31,571 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:31,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2064 [2021-07-09 17:30:31,781 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1506069959, now seen corresponding path program 257 times [2021-07-09 17:30:31,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:31,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751579829] [2021-07-09 17:30:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:31,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:31,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751579829] [2021-07-09 17:30:31,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751579829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:31,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802115948] [2021-07-09 17:30:31,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:31,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:31,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:31,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:31,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:32,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802115948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:32,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:32,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:32,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520943] [2021-07-09 17:30:32,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:32,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:32,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:32,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:32,094 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:32,448 INFO L93 Difference]: Finished difference Result 261 states and 573 transitions. [2021-07-09 17:30:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:32,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:32,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:32,449 INFO L225 Difference]: With dead ends: 261 [2021-07-09 17:30:32,449 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:30:32,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 389.8ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:30:32,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 220. [2021-07-09 17:30:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-09 17:30:32,451 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-09 17:30:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:32,451 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-09 17:30:32,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-09 17:30:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:32,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:32,452 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:32,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2069 [2021-07-09 17:30:32,665 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:32,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1992161585, now seen corresponding path program 258 times [2021-07-09 17:30:32,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:32,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519608721] [2021-07-09 17:30:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:32,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:32,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519608721] [2021-07-09 17:30:32,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519608721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:32,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492168384] [2021-07-09 17:30:32,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:32,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:32,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:32,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:32,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:32,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492168384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:32,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:32,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:32,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891099188] [2021-07-09 17:30:32,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:32,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:32,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:32,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:32,976 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:33,308 INFO L93 Difference]: Finished difference Result 258 states and 567 transitions. [2021-07-09 17:30:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:33,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:33,309 INFO L225 Difference]: With dead ends: 258 [2021-07-09 17:30:33,309 INFO L226 Difference]: Without dead ends: 258 [2021-07-09 17:30:33,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 405.4ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:30:33,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-09 17:30:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 220. [2021-07-09 17:30:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-09 17:30:33,311 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-09 17:30:33,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:33,312 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-09 17:30:33,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:33,312 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-09 17:30:33,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:33,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:33,312 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:33,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2074,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:33,513 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:33,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:33,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1704611350, now seen corresponding path program 259 times [2021-07-09 17:30:33,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:33,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66993784] [2021-07-09 17:30:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:33,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:33,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66993784] [2021-07-09 17:30:33,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66993784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:33,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807775851] [2021-07-09 17:30:33,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:33,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:33,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:33,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807775851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:33,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:33,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:33,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303239035] [2021-07-09 17:30:33,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:33,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:33,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:33,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:33,873 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:34,097 INFO L93 Difference]: Finished difference Result 243 states and 539 transitions. [2021-07-09 17:30:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:30:34,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:34,098 INFO L225 Difference]: With dead ends: 243 [2021-07-09 17:30:34,098 INFO L226 Difference]: Without dead ends: 243 [2021-07-09 17:30:34,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-09 17:30:34,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2021-07-09 17:30:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:34,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-09 17:30:34,100 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-09 17:30:34,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:34,100 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-09 17:30:34,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:34,100 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-09 17:30:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:34,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:34,100 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:34,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2081,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:34,301 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:34,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:34,301 INFO L82 PathProgramCache]: Analyzing trace with hash -450444695, now seen corresponding path program 260 times [2021-07-09 17:30:34,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:34,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669627967] [2021-07-09 17:30:34,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:34,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:34,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669627967] [2021-07-09 17:30:34,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669627967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:34,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015898100] [2021-07-09 17:30:34,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:34,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:34,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:34,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:34,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:34,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015898100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:34,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:34,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:34,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739703560] [2021-07-09 17:30:34,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:34,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:34,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:34,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:34,587 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:34,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:34,792 INFO L93 Difference]: Finished difference Result 254 states and 557 transitions. [2021-07-09 17:30:34,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:34,792 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:34,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:34,792 INFO L225 Difference]: With dead ends: 254 [2021-07-09 17:30:34,792 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:30:34,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:30:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2021-07-09 17:30:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2546296296296298) internal successors, (487), 216 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-07-09 17:30:34,795 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-07-09 17:30:34,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:34,795 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-07-09 17:30:34,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-07-09 17:30:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:34,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:34,795 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:34,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2089 [2021-07-09 17:30:34,995 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:34,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1521440159, now seen corresponding path program 261 times [2021-07-09 17:30:34,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:34,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738185073] [2021-07-09 17:30:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:35,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:35,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738185073] [2021-07-09 17:30:35,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738185073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:35,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237518463] [2021-07-09 17:30:35,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:35,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:30:35,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:35,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:35,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:35,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237518463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:35,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:35,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:35,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286430314] [2021-07-09 17:30:35,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:35,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:35,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:35,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:35,285 INFO L87 Difference]: Start difference. First operand 217 states and 487 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:35,725 INFO L93 Difference]: Finished difference Result 266 states and 581 transitions. [2021-07-09 17:30:35,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:30:35,725 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:35,726 INFO L225 Difference]: With dead ends: 266 [2021-07-09 17:30:35,726 INFO L226 Difference]: Without dead ends: 266 [2021-07-09 17:30:35,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:30:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-09 17:30:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 219. [2021-07-09 17:30:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.261467889908257) internal successors, (493), 218 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 493 transitions. [2021-07-09 17:30:35,728 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 493 transitions. Word has length 19 [2021-07-09 17:30:35,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:35,728 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 493 transitions. [2021-07-09 17:30:35,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 493 transitions. [2021-07-09 17:30:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:35,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:35,728 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:35,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2094,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:35,929 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:35,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:35,931 INFO L82 PathProgramCache]: Analyzing trace with hash -724704407, now seen corresponding path program 262 times [2021-07-09 17:30:35,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:35,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150472271] [2021-07-09 17:30:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:36,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:36,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150472271] [2021-07-09 17:30:36,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150472271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:36,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665538780] [2021-07-09 17:30:36,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:36,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:36,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:36,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:36,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:36,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665538780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:36,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:36,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:36,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152905739] [2021-07-09 17:30:36,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:36,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:36,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:36,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:36,223 INFO L87 Difference]: Start difference. First operand 219 states and 493 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:36,472 INFO L93 Difference]: Finished difference Result 260 states and 571 transitions. [2021-07-09 17:30:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:36,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:36,473 INFO L225 Difference]: With dead ends: 260 [2021-07-09 17:30:36,473 INFO L226 Difference]: Without dead ends: 260 [2021-07-09 17:30:36,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:36,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-09 17:30:36,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 221. [2021-07-09 17:30:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2590909090909093) internal successors, (497), 220 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:36,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 497 transitions. [2021-07-09 17:30:36,476 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 497 transitions. Word has length 19 [2021-07-09 17:30:36,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:36,476 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 497 transitions. [2021-07-09 17:30:36,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:36,476 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 497 transitions. [2021-07-09 17:30:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:36,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:36,476 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:36,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2099,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:36,677 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:36,677 INFO L82 PathProgramCache]: Analyzing trace with hash -437154172, now seen corresponding path program 263 times [2021-07-09 17:30:36,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:36,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871036129] [2021-07-09 17:30:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:36,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:36,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871036129] [2021-07-09 17:30:36,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871036129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:36,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031148866] [2021-07-09 17:30:36,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:36,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:36,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:36,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:36,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:37,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031148866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:37,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:37,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:37,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800172385] [2021-07-09 17:30:37,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:37,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:37,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:37,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:37,025 INFO L87 Difference]: Start difference. First operand 221 states and 497 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:37,328 INFO L93 Difference]: Finished difference Result 252 states and 556 transitions. [2021-07-09 17:30:37,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:37,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:37,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:37,329 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:30:37,329 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:30:37,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:30:37,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:30:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 217. [2021-07-09 17:30:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2546296296296298) internal successors, (487), 216 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-07-09 17:30:37,331 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-07-09 17:30:37,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:37,331 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-07-09 17:30:37,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:37,331 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-07-09 17:30:37,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:37,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:37,332 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:37,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2106 [2021-07-09 17:30:37,532 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:37,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:37,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1290392199, now seen corresponding path program 264 times [2021-07-09 17:30:37,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:37,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208130117] [2021-07-09 17:30:37,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:37,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:37,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208130117] [2021-07-09 17:30:37,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208130117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:37,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774337313] [2021-07-09 17:30:37,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:37,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:37,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:37,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:37,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:37,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774337313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:37,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:37,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:37,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012777218] [2021-07-09 17:30:37,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:37,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:37,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:37,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:37,858 INFO L87 Difference]: Start difference. First operand 217 states and 487 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:38,165 INFO L93 Difference]: Finished difference Result 255 states and 559 transitions. [2021-07-09 17:30:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:30:38,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:38,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:38,166 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:30:38,166 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:30:38,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 353.9ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:30:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2021-07-09 17:30:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.2522935779816513) internal successors, (491), 218 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 491 transitions. [2021-07-09 17:30:38,169 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 491 transitions. Word has length 19 [2021-07-09 17:30:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:38,169 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 491 transitions. [2021-07-09 17:30:38,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 491 transitions. [2021-07-09 17:30:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:38,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:38,169 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:38,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2114 [2021-07-09 17:30:38,369 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:38,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:38,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2087127951, now seen corresponding path program 265 times [2021-07-09 17:30:38,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:38,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520232374] [2021-07-09 17:30:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:38,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:38,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520232374] [2021-07-09 17:30:38,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520232374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:38,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240907754] [2021-07-09 17:30:38,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:38,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:38,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240907754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:38,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:38,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:38,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136659559] [2021-07-09 17:30:38,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:38,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:38,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:38,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:38,667 INFO L87 Difference]: Start difference. First operand 219 states and 491 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:39,003 INFO L93 Difference]: Finished difference Result 261 states and 571 transitions. [2021-07-09 17:30:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:30:39,004 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:39,004 INFO L225 Difference]: With dead ends: 261 [2021-07-09 17:30:39,004 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:30:39,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 350.2ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:30:39,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 220. [2021-07-09 17:30:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2511415525114153) internal successors, (493), 219 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 493 transitions. [2021-07-09 17:30:39,006 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 493 transitions. Word has length 19 [2021-07-09 17:30:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:39,006 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 493 transitions. [2021-07-09 17:30:39,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 493 transitions. [2021-07-09 17:30:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:39,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:39,007 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:39,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2119 [2021-07-09 17:30:39,207 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:39,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:39,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1920289110, now seen corresponding path program 266 times [2021-07-09 17:30:39,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:39,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085299292] [2021-07-09 17:30:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:39,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:39,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085299292] [2021-07-09 17:30:39,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085299292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:39,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053823488] [2021-07-09 17:30:39,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:39,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:39,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:39,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:39,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:39,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053823488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:39,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:39,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:39,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306666899] [2021-07-09 17:30:39,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:39,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:39,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:39,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:39,538 INFO L87 Difference]: Start difference. First operand 220 states and 493 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:39,892 INFO L93 Difference]: Finished difference Result 256 states and 561 transitions. [2021-07-09 17:30:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:39,892 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:39,892 INFO L225 Difference]: With dead ends: 256 [2021-07-09 17:30:39,892 INFO L226 Difference]: Without dead ends: 256 [2021-07-09 17:30:39,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:30:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-07-09 17:30:39,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 218. [2021-07-09 17:30:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2534562211981566) internal successors, (489), 217 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 489 transitions. [2021-07-09 17:30:39,895 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 489 transitions. Word has length 19 [2021-07-09 17:30:39,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:39,895 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 489 transitions. [2021-07-09 17:30:39,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:39,895 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 489 transitions. [2021-07-09 17:30:39,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:39,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:39,895 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:40,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2126,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:40,096 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:40,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:40,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1701493079, now seen corresponding path program 267 times [2021-07-09 17:30:40,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:40,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68005663] [2021-07-09 17:30:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:40,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:40,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68005663] [2021-07-09 17:30:40,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68005663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:40,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085789457] [2021-07-09 17:30:40,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:40,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:30:40,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:40,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:40,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:40,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085789457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:40,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:40,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:40,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260674712] [2021-07-09 17:30:40,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:40,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:40,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:40,481 INFO L87 Difference]: Start difference. First operand 218 states and 489 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:41,068 INFO L93 Difference]: Finished difference Result 285 states and 602 transitions. [2021-07-09 17:30:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:30:41,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:41,069 INFO L225 Difference]: With dead ends: 285 [2021-07-09 17:30:41,069 INFO L226 Difference]: Without dead ends: 285 [2021-07-09 17:30:41,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 708.5ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:30:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-07-09 17:30:41,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2021-07-09 17:30:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.234782608695652) internal successors, (514), 230 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 514 transitions. [2021-07-09 17:30:41,071 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 514 transitions. Word has length 19 [2021-07-09 17:30:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:41,071 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 514 transitions. [2021-07-09 17:30:41,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 514 transitions. [2021-07-09 17:30:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:41,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:41,072 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:41,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2134 [2021-07-09 17:30:41,272 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:41,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1413942844, now seen corresponding path program 268 times [2021-07-09 17:30:41,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:41,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418497866] [2021-07-09 17:30:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:41,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:41,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418497866] [2021-07-09 17:30:41,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418497866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:41,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226877605] [2021-07-09 17:30:41,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:41,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:41,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:41,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:41,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:41,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226877605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:41,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:41,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:41,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939283840] [2021-07-09 17:30:41,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:41,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:41,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:41,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:41,570 INFO L87 Difference]: Start difference. First operand 231 states and 514 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:42,125 INFO L93 Difference]: Finished difference Result 337 states and 704 transitions. [2021-07-09 17:30:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:30:42,125 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:42,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:42,126 INFO L225 Difference]: With dead ends: 337 [2021-07-09 17:30:42,126 INFO L226 Difference]: Without dead ends: 337 [2021-07-09 17:30:42,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:30:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-09 17:30:42,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 232. [2021-07-09 17:30:42,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.2467532467532467) internal successors, (519), 231 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 519 transitions. [2021-07-09 17:30:42,129 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 519 transitions. Word has length 19 [2021-07-09 17:30:42,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:42,129 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 519 transitions. [2021-07-09 17:30:42,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,129 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 519 transitions. [2021-07-09 17:30:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:42,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:42,129 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:42,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2142,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:42,330 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:42,330 INFO L82 PathProgramCache]: Analyzing trace with hash 920989127, now seen corresponding path program 269 times [2021-07-09 17:30:42,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:42,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674110255] [2021-07-09 17:30:42,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:42,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:42,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674110255] [2021-07-09 17:30:42,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674110255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:42,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972126228] [2021-07-09 17:30:42,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:42,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:30:42,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:42,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:42,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:42,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972126228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:42,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:42,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:42,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769254017] [2021-07-09 17:30:42,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:42,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:42,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:42,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:42,701 INFO L87 Difference]: Start difference. First operand 232 states and 519 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:42,987 INFO L93 Difference]: Finished difference Result 253 states and 555 transitions. [2021-07-09 17:30:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:42,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:42,988 INFO L225 Difference]: With dead ends: 253 [2021-07-09 17:30:42,988 INFO L226 Difference]: Without dead ends: 247 [2021-07-09 17:30:42,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 434.4ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-09 17:30:42,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 223. [2021-07-09 17:30:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.265765765765766) internal successors, (503), 222 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 503 transitions. [2021-07-09 17:30:42,990 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 503 transitions. Word has length 19 [2021-07-09 17:30:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:42,990 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 503 transitions. [2021-07-09 17:30:42,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 503 transitions. [2021-07-09 17:30:42,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:42,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:42,991 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:43,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2149,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:43,191 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:43,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:43,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1111952564, now seen corresponding path program 270 times [2021-07-09 17:30:43,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:43,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776057622] [2021-07-09 17:30:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:43,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:43,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776057622] [2021-07-09 17:30:43,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776057622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:43,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938108985] [2021-07-09 17:30:43,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:43,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:30:43,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:43,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:43,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938108985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:43,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:43,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:43,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917088520] [2021-07-09 17:30:43,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:43,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:43,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:43,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:43,524 INFO L87 Difference]: Start difference. First operand 223 states and 503 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:43,938 INFO L93 Difference]: Finished difference Result 279 states and 607 transitions. [2021-07-09 17:30:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:43,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:43,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:43,938 INFO L225 Difference]: With dead ends: 279 [2021-07-09 17:30:43,938 INFO L226 Difference]: Without dead ends: 279 [2021-07-09 17:30:43,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 442.4ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:30:43,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-07-09 17:30:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 221. [2021-07-09 17:30:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2545454545454544) internal successors, (496), 220 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 496 transitions. [2021-07-09 17:30:43,941 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 496 transitions. Word has length 19 [2021-07-09 17:30:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:43,941 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 496 transitions. [2021-07-09 17:30:43,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 496 transitions. [2021-07-09 17:30:43,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:43,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:43,941 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:44,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2157 [2021-07-09 17:30:44,142 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:44,142 INFO L82 PathProgramCache]: Analyzing trace with hash -57431139, now seen corresponding path program 271 times [2021-07-09 17:30:44,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:44,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964245486] [2021-07-09 17:30:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:44,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:44,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964245486] [2021-07-09 17:30:44,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964245486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:44,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935517632] [2021-07-09 17:30:44,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:44,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:44,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935517632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:44,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:44,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:44,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094939398] [2021-07-09 17:30:44,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:44,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:44,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:44,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:44,423 INFO L87 Difference]: Start difference. First operand 221 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:44,721 INFO L93 Difference]: Finished difference Result 247 states and 546 transitions. [2021-07-09 17:30:44,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:44,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:44,722 INFO L225 Difference]: With dead ends: 247 [2021-07-09 17:30:44,722 INFO L226 Difference]: Without dead ends: 247 [2021-07-09 17:30:44,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 366.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:44,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-09 17:30:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-07-09 17:30:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.253393665158371) internal successors, (498), 221 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 498 transitions. [2021-07-09 17:30:44,724 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 498 transitions. Word has length 19 [2021-07-09 17:30:44,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:44,724 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 498 transitions. [2021-07-09 17:30:44,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 498 transitions. [2021-07-09 17:30:44,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:44,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:44,725 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:44,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2162,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:44,926 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:44,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:44,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1101447845, now seen corresponding path program 272 times [2021-07-09 17:30:44,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:44,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120899882] [2021-07-09 17:30:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:45,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:45,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120899882] [2021-07-09 17:30:45,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120899882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102598162] [2021-07-09 17:30:45,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:45,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:45,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:45,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:30:45,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:45,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102598162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:45,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:45,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276189215] [2021-07-09 17:30:45,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:45,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:45,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:45,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:45,295 INFO L87 Difference]: Start difference. First operand 222 states and 498 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:45,903 INFO L93 Difference]: Finished difference Result 261 states and 574 transitions. [2021-07-09 17:30:45,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:45,903 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:45,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:45,904 INFO L225 Difference]: With dead ends: 261 [2021-07-09 17:30:45,904 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:30:45,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 730.6ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:30:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:30:45,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 223. [2021-07-09 17:30:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2522522522522523) internal successors, (500), 222 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 500 transitions. [2021-07-09 17:30:45,906 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 500 transitions. Word has length 19 [2021-07-09 17:30:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:45,906 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 500 transitions. [2021-07-09 17:30:45,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 500 transitions. [2021-07-09 17:30:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:45,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:45,907 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:46,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2167 [2021-07-09 17:30:46,107 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:46,108 INFO L82 PathProgramCache]: Analyzing trace with hash 30452381, now seen corresponding path program 273 times [2021-07-09 17:30:46,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:46,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560131758] [2021-07-09 17:30:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:46,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:46,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560131758] [2021-07-09 17:30:46,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560131758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:46,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036441371] [2021-07-09 17:30:46,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:46,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:30:46,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:46,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 17:30:46,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:46,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036441371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:46,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:46,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-09 17:30:46,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883441528] [2021-07-09 17:30:46,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:30:46,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:46,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:30:46,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:30:46,600 INFO L87 Difference]: Start difference. First operand 223 states and 500 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:47,289 INFO L93 Difference]: Finished difference Result 270 states and 592 transitions. [2021-07-09 17:30:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:30:47,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:47,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:47,290 INFO L225 Difference]: With dead ends: 270 [2021-07-09 17:30:47,290 INFO L226 Difference]: Without dead ends: 270 [2021-07-09 17:30:47,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 813.1ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:30:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-07-09 17:30:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 224. [2021-07-09 17:30:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2511210762331837) internal successors, (502), 223 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 502 transitions. [2021-07-09 17:30:47,292 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 502 transitions. Word has length 19 [2021-07-09 17:30:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:47,293 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 502 transitions. [2021-07-09 17:30:47,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:47,293 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 502 transitions. [2021-07-09 17:30:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:47,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:47,293 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:47,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2171,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:47,494 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:47,494 INFO L82 PathProgramCache]: Analyzing trace with hash 827188133, now seen corresponding path program 274 times [2021-07-09 17:30:47,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:47,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639544238] [2021-07-09 17:30:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:47,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:47,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639544238] [2021-07-09 17:30:47,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639544238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:47,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727143632] [2021-07-09 17:30:47,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:47,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:47,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:47,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:47,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:47,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727143632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:47,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:47,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:47,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720065292] [2021-07-09 17:30:47,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:47,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:47,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:47,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:47,816 INFO L87 Difference]: Start difference. First operand 224 states and 502 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:48,623 INFO L93 Difference]: Finished difference Result 294 states and 627 transitions. [2021-07-09 17:30:48,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:30:48,623 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:48,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:48,623 INFO L225 Difference]: With dead ends: 294 [2021-07-09 17:30:48,623 INFO L226 Difference]: Without dead ends: 294 [2021-07-09 17:30:48,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 796.1ms TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:30:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-09 17:30:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2021-07-09 17:30:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2589285714285716) internal successors, (506), 224 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 506 transitions. [2021-07-09 17:30:48,626 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 506 transitions. Word has length 19 [2021-07-09 17:30:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:48,626 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 506 transitions. [2021-07-09 17:30:48,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 506 transitions. [2021-07-09 17:30:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:48,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:48,627 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:48,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2177 [2021-07-09 17:30:48,827 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:48,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1303499579, now seen corresponding path program 275 times [2021-07-09 17:30:48,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:48,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462021642] [2021-07-09 17:30:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:48,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:48,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462021642] [2021-07-09 17:30:48,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462021642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:48,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500370813] [2021-07-09 17:30:48,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:48,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:30:48,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:48,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:49,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500370813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:49,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:49,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:49,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976155403] [2021-07-09 17:30:49,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:49,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:49,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:49,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:49,136 INFO L87 Difference]: Start difference. First operand 225 states and 506 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:49,692 INFO L93 Difference]: Finished difference Result 261 states and 570 transitions. [2021-07-09 17:30:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:30:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:49,693 INFO L225 Difference]: With dead ends: 261 [2021-07-09 17:30:49,693 INFO L226 Difference]: Without dead ends: 258 [2021-07-09 17:30:49,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 602.1ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:30:49,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-09 17:30:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 225. [2021-07-09 17:30:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2544642857142856) internal successors, (505), 224 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 505 transitions. [2021-07-09 17:30:49,696 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 505 transitions. Word has length 19 [2021-07-09 17:30:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:49,696 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 505 transitions. [2021-07-09 17:30:49,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 505 transitions. [2021-07-09 17:30:49,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:49,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:49,696 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:49,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2184 [2021-07-09 17:30:49,897 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1954584226, now seen corresponding path program 276 times [2021-07-09 17:30:49,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:49,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11723732] [2021-07-09 17:30:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:49,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:49,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11723732] [2021-07-09 17:30:49,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11723732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:49,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188247085] [2021-07-09 17:30:49,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:50,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:50,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:50,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:50,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:50,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188247085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:50,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:50,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:30:50,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524723348] [2021-07-09 17:30:50,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:30:50,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:50,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:30:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:50,257 INFO L87 Difference]: Start difference. First operand 225 states and 505 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:50,571 INFO L93 Difference]: Finished difference Result 245 states and 540 transitions. [2021-07-09 17:30:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:50,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:50,572 INFO L225 Difference]: With dead ends: 245 [2021-07-09 17:30:50,572 INFO L226 Difference]: Without dead ends: 243 [2021-07-09 17:30:50,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:50,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-09 17:30:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2021-07-09 17:30:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2545454545454544) internal successors, (496), 220 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 496 transitions. [2021-07-09 17:30:50,574 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 496 transitions. Word has length 19 [2021-07-09 17:30:50,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:50,574 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 496 transitions. [2021-07-09 17:30:50,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:50,575 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 496 transitions. [2021-07-09 17:30:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:50,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:50,575 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:50,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2192,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:50,775 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:50,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:50,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1926062273, now seen corresponding path program 277 times [2021-07-09 17:30:50,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:50,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682993825] [2021-07-09 17:30:50,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:50,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:50,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682993825] [2021-07-09 17:30:50,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682993825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:50,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589977688] [2021-07-09 17:30:50,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:50,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:50,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:51,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589977688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:51,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:51,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942957780] [2021-07-09 17:30:51,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:51,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:51,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:51,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:51,074 INFO L87 Difference]: Start difference. First operand 221 states and 496 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:51,240 INFO L93 Difference]: Finished difference Result 256 states and 562 transitions. [2021-07-09 17:30:51,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:30:51,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:51,241 INFO L225 Difference]: With dead ends: 256 [2021-07-09 17:30:51,241 INFO L226 Difference]: Without dead ends: 256 [2021-07-09 17:30:51,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:30:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-07-09 17:30:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 219. [2021-07-09 17:30:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.2477064220183487) internal successors, (490), 218 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 490 transitions. [2021-07-09 17:30:51,243 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 490 transitions. Word has length 19 [2021-07-09 17:30:51,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:51,243 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 490 transitions. [2021-07-09 17:30:51,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:51,243 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 490 transitions. [2021-07-09 17:30:51,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:51,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:51,244 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:51,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2200 [2021-07-09 17:30:51,460 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:51,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2094645311, now seen corresponding path program 278 times [2021-07-09 17:30:51,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:51,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752798427] [2021-07-09 17:30:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:51,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:51,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752798427] [2021-07-09 17:30:51,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752798427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821989431] [2021-07-09 17:30:51,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:51,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:51,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:51,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:51,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821989431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:51,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:51,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:51,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747858976] [2021-07-09 17:30:51,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:51,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:51,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:51,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:51,752 INFO L87 Difference]: Start difference. First operand 219 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:52,159 INFO L93 Difference]: Finished difference Result 263 states and 576 transitions. [2021-07-09 17:30:52,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:52,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:52,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:52,164 INFO L225 Difference]: With dead ends: 263 [2021-07-09 17:30:52,164 INFO L226 Difference]: Without dead ends: 263 [2021-07-09 17:30:52,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 440.8ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-09 17:30:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 216. [2021-07-09 17:30:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2511627906976743) internal successors, (484), 215 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 484 transitions. [2021-07-09 17:30:52,166 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 484 transitions. Word has length 19 [2021-07-09 17:30:52,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:52,166 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 484 transitions. [2021-07-09 17:30:52,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,166 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 484 transitions. [2021-07-09 17:30:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:52,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:52,167 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:52,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2205,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:52,367 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:52,367 INFO L82 PathProgramCache]: Analyzing trace with hash -554628451, now seen corresponding path program 279 times [2021-07-09 17:30:52,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:52,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817771265] [2021-07-09 17:30:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:52,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:52,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817771265] [2021-07-09 17:30:52,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817771265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319930270] [2021-07-09 17:30:52,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:52,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:30:52,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:52,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:52,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:52,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319930270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:52,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:52,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773807543] [2021-07-09 17:30:52,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:52,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:52,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:52,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:52,766 INFO L87 Difference]: Start difference. First operand 216 states and 484 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:52,991 INFO L93 Difference]: Finished difference Result 240 states and 525 transitions. [2021-07-09 17:30:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:30:52,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:52,991 INFO L225 Difference]: With dead ends: 240 [2021-07-09 17:30:52,991 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:30:52,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:30:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 212. [2021-07-09 17:30:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.251184834123223) internal successors, (475), 211 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 475 transitions. [2021-07-09 17:30:52,994 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 475 transitions. Word has length 19 [2021-07-09 17:30:52,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:52,994 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 475 transitions. [2021-07-09 17:30:52,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 475 transitions. [2021-07-09 17:30:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:52,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:52,994 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:53,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-07-09 17:30:53,195 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:53,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:53,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1289595419, now seen corresponding path program 280 times [2021-07-09 17:30:53,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:53,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93217206] [2021-07-09 17:30:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:53,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:53,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93217206] [2021-07-09 17:30:53,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93217206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:53,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494793231] [2021-07-09 17:30:53,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:53,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:53,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:53,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:53,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494793231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:53,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:53,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:53,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58343402] [2021-07-09 17:30:53,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:53,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:53,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:53,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:53,488 INFO L87 Difference]: Start difference. First operand 212 states and 475 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:53,641 INFO L93 Difference]: Finished difference Result 245 states and 539 transitions. [2021-07-09 17:30:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:53,642 INFO L225 Difference]: With dead ends: 245 [2021-07-09 17:30:53,642 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:30:53,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:30:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2021-07-09 17:30:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.25) internal successors, (477), 212 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 477 transitions. [2021-07-09 17:30:53,644 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 477 transitions. Word has length 19 [2021-07-09 17:30:53,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:53,644 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 477 transitions. [2021-07-09 17:30:53,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 477 transitions. [2021-07-09 17:30:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:53,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:53,645 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:53,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2220,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,845 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:53,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1934376413, now seen corresponding path program 281 times [2021-07-09 17:30:53,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:53,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689219307] [2021-07-09 17:30:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:53,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:53,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689219307] [2021-07-09 17:30:53,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689219307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:53,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804055941] [2021-07-09 17:30:53,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:53,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:53,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:53,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:54,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804055941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:54,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:54,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:54,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750533229] [2021-07-09 17:30:54,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:54,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:54,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:54,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:54,149 INFO L87 Difference]: Start difference. First operand 213 states and 477 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:54,526 INFO L93 Difference]: Finished difference Result 260 states and 569 transitions. [2021-07-09 17:30:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:54,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:54,527 INFO L225 Difference]: With dead ends: 260 [2021-07-09 17:30:54,527 INFO L226 Difference]: Without dead ends: 260 [2021-07-09 17:30:54,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:30:54,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-09 17:30:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 214. [2021-07-09 17:30:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.248826291079812) internal successors, (479), 213 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 479 transitions. [2021-07-09 17:30:54,530 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 479 transitions. Word has length 19 [2021-07-09 17:30:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:54,530 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 479 transitions. [2021-07-09 17:30:54,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 479 transitions. [2021-07-09 17:30:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:54,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:54,530 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:54,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-07-09 17:30:54,731 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:54,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1563855131, now seen corresponding path program 282 times [2021-07-09 17:30:54,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:54,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089106669] [2021-07-09 17:30:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:54,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:54,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089106669] [2021-07-09 17:30:54,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089106669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:54,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023191835] [2021-07-09 17:30:54,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:54,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:30:54,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:54,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:54,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:55,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023191835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:55,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:55,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:55,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472018513] [2021-07-09 17:30:55,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:55,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:55,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:55,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:55,029 INFO L87 Difference]: Start difference. First operand 214 states and 479 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:55,528 INFO L93 Difference]: Finished difference Result 283 states and 608 transitions. [2021-07-09 17:30:55,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:55,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:55,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:55,528 INFO L225 Difference]: With dead ends: 283 [2021-07-09 17:30:55,528 INFO L226 Difference]: Without dead ends: 283 [2021-07-09 17:30:55,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 550.7ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:30:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-09 17:30:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 215. [2021-07-09 17:30:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-09 17:30:55,531 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-09 17:30:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:55,531 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-09 17:30:55,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-09 17:30:55,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:55,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:55,531 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:55,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2230,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:55,732 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:55,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:55,732 INFO L82 PathProgramCache]: Analyzing trace with hash -436459038, now seen corresponding path program 283 times [2021-07-09 17:30:55,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:55,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460941075] [2021-07-09 17:30:55,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:55,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:55,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460941075] [2021-07-09 17:30:55,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460941075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:55,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678870529] [2021-07-09 17:30:55,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:55,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:55,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:56,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678870529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:56,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:56,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695299073] [2021-07-09 17:30:56,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:56,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:56,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:56,072 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:56,299 INFO L93 Difference]: Finished difference Result 260 states and 562 transitions. [2021-07-09 17:30:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:56,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:56,300 INFO L225 Difference]: With dead ends: 260 [2021-07-09 17:30:56,300 INFO L226 Difference]: Without dead ends: 260 [2021-07-09 17:30:56,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 353.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:30:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-09 17:30:56,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 215. [2021-07-09 17:30:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-09 17:30:56,303 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-09 17:30:56,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:56,303 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-09 17:30:56,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:56,303 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-09 17:30:56,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:56,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:56,303 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:56,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2237,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:56,503 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:56,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:56,504 INFO L82 PathProgramCache]: Analyzing trace with hash 451241475, now seen corresponding path program 284 times [2021-07-09 17:30:56,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:56,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491031093] [2021-07-09 17:30:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:56,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:56,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491031093] [2021-07-09 17:30:56,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491031093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116341819] [2021-07-09 17:30:56,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:56,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:56,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:56,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:56,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:56,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116341819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:56,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:56,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:56,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698790540] [2021-07-09 17:30:56,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:56,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:56,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:56,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:56,816 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:57,037 INFO L93 Difference]: Finished difference Result 238 states and 527 transitions. [2021-07-09 17:30:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:30:57,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:57,037 INFO L225 Difference]: With dead ends: 238 [2021-07-09 17:30:57,038 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:30:57,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 301.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:30:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:30:57,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 216. [2021-07-09 17:30:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.255813953488372) internal successors, (485), 215 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 485 transitions. [2021-07-09 17:30:57,040 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 485 transitions. Word has length 19 [2021-07-09 17:30:57,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:57,040 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 485 transitions. [2021-07-09 17:30:57,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:57,040 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 485 transitions. [2021-07-09 17:30:57,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:57,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:57,040 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:57,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2245 [2021-07-09 17:30:57,245 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:57,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1247977227, now seen corresponding path program 285 times [2021-07-09 17:30:57,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:57,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529256775] [2021-07-09 17:30:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:57,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:57,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529256775] [2021-07-09 17:30:57,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529256775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:57,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135593585] [2021-07-09 17:30:57,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:57,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:30:57,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:57,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:57,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:57,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135593585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:57,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:57,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:57,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825394649] [2021-07-09 17:30:57,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:57,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:57,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:57,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:57,553 INFO L87 Difference]: Start difference. First operand 216 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:58,014 INFO L93 Difference]: Finished difference Result 276 states and 591 transitions. [2021-07-09 17:30:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:30:58,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:58,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:58,015 INFO L225 Difference]: With dead ends: 276 [2021-07-09 17:30:58,015 INFO L226 Difference]: Without dead ends: 276 [2021-07-09 17:30:58,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 514.7ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-07-09 17:30:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 217. [2021-07-09 17:30:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.259259259259259) internal successors, (488), 216 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 488 transitions. [2021-07-09 17:30:58,018 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 488 transitions. Word has length 19 [2021-07-09 17:30:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:58,018 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 488 transitions. [2021-07-09 17:30:58,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 488 transitions. [2021-07-09 17:30:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:58,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:58,018 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:58,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2250,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:58,219 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:58,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1724288673, now seen corresponding path program 286 times [2021-07-09 17:30:58,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:58,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75939593] [2021-07-09 17:30:58,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:58,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:58,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75939593] [2021-07-09 17:30:58,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75939593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:58,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561699747] [2021-07-09 17:30:58,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:58,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:58,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:58,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:58,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:58,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561699747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:58,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:58,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:58,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409907054] [2021-07-09 17:30:58,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:58,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:58,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:58,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:58,525 INFO L87 Difference]: Start difference. First operand 217 states and 488 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:58,865 INFO L93 Difference]: Finished difference Result 243 states and 534 transitions. [2021-07-09 17:30:58,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:30:58,865 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:58,866 INFO L225 Difference]: With dead ends: 243 [2021-07-09 17:30:58,866 INFO L226 Difference]: Without dead ends: 240 [2021-07-09 17:30:58,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:30:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-09 17:30:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 217. [2021-07-09 17:30:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2546296296296298) internal successors, (487), 216 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-07-09 17:30:58,868 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-07-09 17:30:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:58,868 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-07-09 17:30:58,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:58,868 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-07-09 17:30:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:58,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:58,868 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:59,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2257,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:59,069 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:59,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:59,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1919593976, now seen corresponding path program 287 times [2021-07-09 17:30:59,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:59,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675463735] [2021-07-09 17:30:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:59,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675463735] [2021-07-09 17:30:59,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675463735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:59,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139746216] [2021-07-09 17:30:59,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:59,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:30:59,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:59,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:30:59,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:59,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139746216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:59,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:59,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:30:59,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375658936] [2021-07-09 17:30:59,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:30:59,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:59,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:30:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:30:59,413 INFO L87 Difference]: Start difference. First operand 217 states and 487 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:59,710 INFO L93 Difference]: Finished difference Result 247 states and 545 transitions. [2021-07-09 17:30:59,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:30:59,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:30:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:59,710 INFO L225 Difference]: With dead ends: 247 [2021-07-09 17:30:59,710 INFO L226 Difference]: Without dead ends: 247 [2021-07-09 17:30:59,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 408.6ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:30:59,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-09 17:30:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 215. [2021-07-09 17:30:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-09 17:30:59,713 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-09 17:30:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:59,713 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-09 17:30:59,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-09 17:30:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:30:59,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:59,713 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:59,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2265 [2021-07-09 17:30:59,914 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1754323493, now seen corresponding path program 288 times [2021-07-09 17:30:59,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:59,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812618105] [2021-07-09 17:30:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:00,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:00,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812618105] [2021-07-09 17:31:00,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812618105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874962607] [2021-07-09 17:31:00,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:00,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:31:00,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:00,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:00,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:00,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874962607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:00,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:00,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257606838] [2021-07-09 17:31:00,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:00,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:00,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:00,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:00,289 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:00,600 INFO L93 Difference]: Finished difference Result 255 states and 554 transitions. [2021-07-09 17:31:00,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:00,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:00,601 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:31:00,601 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:31:00,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 430.0ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:31:00,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 217. [2021-07-09 17:31:00,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.259259259259259) internal successors, (488), 216 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 488 transitions. [2021-07-09 17:31:00,603 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 488 transitions. Word has length 19 [2021-07-09 17:31:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:00,603 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 488 transitions. [2021-07-09 17:31:00,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:00,603 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 488 transitions. [2021-07-09 17:31:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:00,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:00,603 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:00,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2273,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:00,804 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:00,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:00,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2041873728, now seen corresponding path program 289 times [2021-07-09 17:31:00,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:00,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901650664] [2021-07-09 17:31:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:00,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:00,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901650664] [2021-07-09 17:31:00,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901650664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:00,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084986656] [2021-07-09 17:31:00,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:00,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:00,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:01,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084986656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:01,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:01,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:01,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60543484] [2021-07-09 17:31:01,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:01,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:01,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:01,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:01,110 INFO L87 Difference]: Start difference. First operand 217 states and 488 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:01,483 INFO L93 Difference]: Finished difference Result 317 states and 668 transitions. [2021-07-09 17:31:01,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:31:01,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:01,483 INFO L225 Difference]: With dead ends: 317 [2021-07-09 17:31:01,483 INFO L226 Difference]: Without dead ends: 317 [2021-07-09 17:31:01,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 428.4ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-09 17:31:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 218. [2021-07-09 17:31:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.271889400921659) internal successors, (493), 217 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 493 transitions. [2021-07-09 17:31:01,486 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 493 transitions. Word has length 19 [2021-07-09 17:31:01,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:01,486 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 493 transitions. [2021-07-09 17:31:01,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:01,486 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 493 transitions. [2021-07-09 17:31:01,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:01,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:01,487 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:01,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2281 [2021-07-09 17:31:01,687 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:01,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:01,687 INFO L82 PathProgramCache]: Analyzing trace with hash 81838403, now seen corresponding path program 290 times [2021-07-09 17:31:01,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:01,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146039288] [2021-07-09 17:31:01,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:01,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:01,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146039288] [2021-07-09 17:31:01,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146039288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:01,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490414501] [2021-07-09 17:31:01,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:01,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:01,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:01,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:01,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:02,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490414501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:02,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:02,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:02,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819623172] [2021-07-09 17:31:02,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:02,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:02,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:02,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:02,054 INFO L87 Difference]: Start difference. First operand 218 states and 493 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:02,293 INFO L93 Difference]: Finished difference Result 242 states and 534 transitions. [2021-07-09 17:31:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:02,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:02,294 INFO L225 Difference]: With dead ends: 242 [2021-07-09 17:31:02,294 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:31:02,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:31:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 218. [2021-07-09 17:31:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2672811059907834) internal successors, (492), 217 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 492 transitions. [2021-07-09 17:31:02,296 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 492 transitions. Word has length 19 [2021-07-09 17:31:02,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:02,296 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 492 transitions. [2021-07-09 17:31:02,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:02,296 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 492 transitions. [2021-07-09 17:31:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:02,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:02,296 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:02,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2288 [2021-07-09 17:31:02,497 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:02,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1951103288, now seen corresponding path program 291 times [2021-07-09 17:31:02,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:02,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350932558] [2021-07-09 17:31:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:02,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:02,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350932558] [2021-07-09 17:31:02,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350932558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:02,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017358159] [2021-07-09 17:31:02,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:02,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:02,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:02,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:31:02,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:02,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017358159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:02,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:02,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:02,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183029053] [2021-07-09 17:31:02,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:02,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:02,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:02,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:02,818 INFO L87 Difference]: Start difference. First operand 218 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:03,107 INFO L93 Difference]: Finished difference Result 265 states and 581 transitions. [2021-07-09 17:31:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:03,107 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:03,107 INFO L225 Difference]: With dead ends: 265 [2021-07-09 17:31:03,107 INFO L226 Difference]: Without dead ends: 265 [2021-07-09 17:31:03,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-09 17:31:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 214. [2021-07-09 17:31:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-07-09 17:31:03,110 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-07-09 17:31:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:03,110 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-07-09 17:31:03,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-07-09 17:31:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:03,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:03,110 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:03,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2296,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:03,311 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:03,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1718698653, now seen corresponding path program 292 times [2021-07-09 17:31:03,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:03,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097361890] [2021-07-09 17:31:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:03,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:03,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097361890] [2021-07-09 17:31:03,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097361890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096749111] [2021-07-09 17:31:03,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:03,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:03,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:03,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:03,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:03,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096749111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:03,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:03,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763724209] [2021-07-09 17:31:03,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:03,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:03,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:03,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:03,636 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:03,822 INFO L93 Difference]: Finished difference Result 237 states and 525 transitions. [2021-07-09 17:31:03,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:03,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:03,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:03,822 INFO L225 Difference]: With dead ends: 237 [2021-07-09 17:31:03,822 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 17:31:03,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 274.6ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:03,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 17:31:03,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 215. [2021-07-09 17:31:03,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-09 17:31:03,825 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-09 17:31:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:03,825 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-09 17:31:03,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-09 17:31:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:03,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:03,825 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:04,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2301,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:04,025 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:04,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:04,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1779532891, now seen corresponding path program 293 times [2021-07-09 17:31:04,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:04,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808260409] [2021-07-09 17:31:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:04,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:04,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808260409] [2021-07-09 17:31:04,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808260409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:04,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369468272] [2021-07-09 17:31:04,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:04,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:04,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:04,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:31:04,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:04,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369468272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:04,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:04,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:04,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343986167] [2021-07-09 17:31:04,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:04,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:04,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:04,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:04,405 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:04,670 INFO L93 Difference]: Finished difference Result 255 states and 558 transitions. [2021-07-09 17:31:04,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:04,671 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:04,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:04,671 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:31:04,671 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:31:04,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:31:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 216. [2021-07-09 17:31:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.26046511627907) internal successors, (486), 215 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 486 transitions. [2021-07-09 17:31:04,674 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 486 transitions. Word has length 19 [2021-07-09 17:31:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:04,674 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 486 transitions. [2021-07-09 17:31:04,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 486 transitions. [2021-07-09 17:31:04,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:04,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:04,674 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:04,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2306 [2021-07-09 17:31:04,890 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:04,891 INFO L82 PathProgramCache]: Analyzing trace with hash -652136798, now seen corresponding path program 294 times [2021-07-09 17:31:04,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:04,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692660048] [2021-07-09 17:31:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:05,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:05,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692660048] [2021-07-09 17:31:05,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692660048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:05,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537571391] [2021-07-09 17:31:05,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:05,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:31:05,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:05,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:05,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:05,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537571391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:05,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:05,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:05,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121863532] [2021-07-09 17:31:05,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:05,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:05,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:05,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:05,241 INFO L87 Difference]: Start difference. First operand 216 states and 486 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:05,847 INFO L93 Difference]: Finished difference Result 359 states and 741 transitions. [2021-07-09 17:31:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:31:05,848 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:05,848 INFO L225 Difference]: With dead ends: 359 [2021-07-09 17:31:05,848 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 17:31:05,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 690.2ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:31:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 17:31:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 221. [2021-07-09 17:31:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2772727272727273) internal successors, (501), 220 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 501 transitions. [2021-07-09 17:31:05,851 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 501 transitions. Word has length 19 [2021-07-09 17:31:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:05,851 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 501 transitions. [2021-07-09 17:31:05,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 501 transitions. [2021-07-09 17:31:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:05,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:05,851 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:06,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2314,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:06,052 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:06,052 INFO L82 PathProgramCache]: Analyzing trace with hash -145790532, now seen corresponding path program 295 times [2021-07-09 17:31:06,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:06,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967811461] [2021-07-09 17:31:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:06,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:06,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967811461] [2021-07-09 17:31:06,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967811461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840985080] [2021-07-09 17:31:06,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:06,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:06,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:06,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840985080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:06,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:06,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956955159] [2021-07-09 17:31:06,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:06,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:06,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:06,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:06,364 INFO L87 Difference]: Start difference. First operand 221 states and 501 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:06,848 INFO L93 Difference]: Finished difference Result 310 states and 655 transitions. [2021-07-09 17:31:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:06,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:06,849 INFO L225 Difference]: With dead ends: 310 [2021-07-09 17:31:06,849 INFO L226 Difference]: Without dead ends: 310 [2021-07-09 17:31:06,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 514.9ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:31:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-07-09 17:31:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 220. [2021-07-09 17:31:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.269406392694064) internal successors, (497), 219 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 497 transitions. [2021-07-09 17:31:06,852 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 497 transitions. Word has length 19 [2021-07-09 17:31:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:06,852 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 497 transitions. [2021-07-09 17:31:06,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 497 transitions. [2021-07-09 17:31:06,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:06,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:06,852 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:07,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2322 [2021-07-09 17:31:07,053 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:07,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:07,053 INFO L82 PathProgramCache]: Analyzing trace with hash -683646110, now seen corresponding path program 296 times [2021-07-09 17:31:07,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:07,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48031293] [2021-07-09 17:31:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:07,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:07,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48031293] [2021-07-09 17:31:07,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48031293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:07,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974756577] [2021-07-09 17:31:07,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:07,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:07,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:07,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:07,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:07,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974756577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:07,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:07,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:07,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316857278] [2021-07-09 17:31:07,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:07,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:07,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:07,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:07,378 INFO L87 Difference]: Start difference. First operand 220 states and 497 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:07,695 INFO L93 Difference]: Finished difference Result 263 states and 578 transitions. [2021-07-09 17:31:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:07,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:07,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:07,696 INFO L225 Difference]: With dead ends: 263 [2021-07-09 17:31:07,696 INFO L226 Difference]: Without dead ends: 263 [2021-07-09 17:31:07,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:07,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-09 17:31:07,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 218. [2021-07-09 17:31:07,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-07-09 17:31:07,698 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-07-09 17:31:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:07,698 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-07-09 17:31:07,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-07-09 17:31:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:07,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:07,699 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:07,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2329 [2021-07-09 17:31:07,899 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:07,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:07,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1538645733, now seen corresponding path program 297 times [2021-07-09 17:31:07,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:07,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371755838] [2021-07-09 17:31:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:07,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:07,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371755838] [2021-07-09 17:31:07,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371755838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:07,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779623239] [2021-07-09 17:31:07,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:08,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:08,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:08,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:08,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:08,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779623239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:08,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:08,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:08,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412409604] [2021-07-09 17:31:08,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:08,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:08,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:08,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:08,266 INFO L87 Difference]: Start difference. First operand 218 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:08,562 INFO L93 Difference]: Finished difference Result 258 states and 561 transitions. [2021-07-09 17:31:08,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:08,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:08,563 INFO L225 Difference]: With dead ends: 258 [2021-07-09 17:31:08,563 INFO L226 Difference]: Without dead ends: 258 [2021-07-09 17:31:08,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 434.2ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:08,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-09 17:31:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 221. [2021-07-09 17:31:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2636363636363637) internal successors, (498), 220 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 498 transitions. [2021-07-09 17:31:08,565 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 498 transitions. Word has length 19 [2021-07-09 17:31:08,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:08,565 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 498 transitions. [2021-07-09 17:31:08,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:08,566 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 498 transitions. [2021-07-09 17:31:08,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:08,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:08,566 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:08,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2334 [2021-07-09 17:31:08,766 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:08,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:08,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1826195968, now seen corresponding path program 298 times [2021-07-09 17:31:08,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:08,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548595547] [2021-07-09 17:31:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:08,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:08,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548595547] [2021-07-09 17:31:08,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548595547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:08,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967510674] [2021-07-09 17:31:08,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:08,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:08,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:08,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:08,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:09,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967510674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:09,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:09,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65642521] [2021-07-09 17:31:09,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:09,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:09,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:09,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:09,079 INFO L87 Difference]: Start difference. First operand 221 states and 498 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:09,571 INFO L93 Difference]: Finished difference Result 298 states and 631 transitions. [2021-07-09 17:31:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:09,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:09,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:09,571 INFO L225 Difference]: With dead ends: 298 [2021-07-09 17:31:09,571 INFO L226 Difference]: Without dead ends: 298 [2021-07-09 17:31:09,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 541.5ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:31:09,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-07-09 17:31:09,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 223. [2021-07-09 17:31:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.279279279279279) internal successors, (506), 222 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 506 transitions. [2021-07-09 17:31:09,574 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 506 transitions. Word has length 19 [2021-07-09 17:31:09,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:09,574 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 506 transitions. [2021-07-09 17:31:09,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:09,574 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 506 transitions. [2021-07-09 17:31:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:09,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:09,575 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:09,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2342 [2021-07-09 17:31:09,782 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:09,782 INFO L82 PathProgramCache]: Analyzing trace with hash -133839357, now seen corresponding path program 299 times [2021-07-09 17:31:09,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:09,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271423430] [2021-07-09 17:31:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:09,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:09,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271423430] [2021-07-09 17:31:09,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271423430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:09,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312212701] [2021-07-09 17:31:09,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:09,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:09,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:09,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:09,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:10,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312212701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:10,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:10,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809759672] [2021-07-09 17:31:10,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:10,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:10,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:10,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:10,157 INFO L87 Difference]: Start difference. First operand 223 states and 506 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:10,447 INFO L93 Difference]: Finished difference Result 249 states and 550 transitions. [2021-07-09 17:31:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:10,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:10,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:10,448 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:31:10,448 INFO L226 Difference]: Without dead ends: 240 [2021-07-09 17:31:10,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 428.9ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:10,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-09 17:31:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 223. [2021-07-09 17:31:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.27027027027027) internal successors, (504), 222 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 504 transitions. [2021-07-09 17:31:10,450 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 504 transitions. Word has length 19 [2021-07-09 17:31:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:10,451 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 504 transitions. [2021-07-09 17:31:10,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 504 transitions. [2021-07-09 17:31:10,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:10,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:10,451 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:10,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2349 [2021-07-09 17:31:10,651 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:10,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:10,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2128186248, now seen corresponding path program 300 times [2021-07-09 17:31:10,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:10,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107146382] [2021-07-09 17:31:10,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:10,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107146382] [2021-07-09 17:31:10,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107146382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360727507] [2021-07-09 17:31:10,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:10,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:10,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:10,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:10,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:10,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360727507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:10,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:10,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100016706] [2021-07-09 17:31:10,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:10,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:10,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:10,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:10,954 INFO L87 Difference]: Start difference. First operand 223 states and 504 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:11,274 INFO L93 Difference]: Finished difference Result 255 states and 564 transitions. [2021-07-09 17:31:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:11,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:11,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:11,275 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:31:11,275 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:31:11,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:31:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 222. [2021-07-09 17:31:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.271493212669683) internal successors, (502), 221 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 502 transitions. [2021-07-09 17:31:11,277 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 502 transitions. Word has length 19 [2021-07-09 17:31:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:11,277 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 502 transitions. [2021-07-09 17:31:11,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,278 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 502 transitions. [2021-07-09 17:31:11,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:11,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:11,278 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:11,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2357,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:11,478 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:11,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:11,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1660434782, now seen corresponding path program 301 times [2021-07-09 17:31:11,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:11,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113049109] [2021-07-09 17:31:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:11,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:11,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113049109] [2021-07-09 17:31:11,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113049109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:11,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802654777] [2021-07-09 17:31:11,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:11,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:11,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802654777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:11,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:11,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:11,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722769093] [2021-07-09 17:31:11,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:11,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:11,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:11,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:11,766 INFO L87 Difference]: Start difference. First operand 222 states and 502 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:11,876 INFO L93 Difference]: Finished difference Result 249 states and 550 transitions. [2021-07-09 17:31:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:11,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:11,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:11,877 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:31:11,877 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 17:31:11,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 17:31:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 219. [2021-07-09 17:31:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-07-09 17:31:11,879 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-07-09 17:31:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:11,879 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-07-09 17:31:11,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-07-09 17:31:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:11,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:11,880 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:12,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2362,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:12,080 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:12,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:12,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1443064199, now seen corresponding path program 302 times [2021-07-09 17:31:12,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:12,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914516669] [2021-07-09 17:31:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:12,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:12,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914516669] [2021-07-09 17:31:12,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914516669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860050653] [2021-07-09 17:31:12,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:12,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:12,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:12,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:31:12,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:12,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860050653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:12,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:12,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:12,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782566190] [2021-07-09 17:31:12,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:12,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:12,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:12,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:12,406 INFO L87 Difference]: Start difference. First operand 219 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:12,709 INFO L93 Difference]: Finished difference Result 238 states and 530 transitions. [2021-07-09 17:31:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:12,709 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:12,710 INFO L225 Difference]: With dead ends: 238 [2021-07-09 17:31:12,710 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:31:12,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 430.0ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:31:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 219. [2021-07-09 17:31:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-07-09 17:31:12,712 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-07-09 17:31:12,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:12,712 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-07-09 17:31:12,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:12,712 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-07-09 17:31:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:12,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:12,713 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:12,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2367,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:12,913 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:12,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1693024113, now seen corresponding path program 303 times [2021-07-09 17:31:12,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:12,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407127534] [2021-07-09 17:31:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:13,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:13,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407127534] [2021-07-09 17:31:13,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407127534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:13,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250559042] [2021-07-09 17:31:13,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:13,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:13,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:13,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:13,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:13,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250559042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:13,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:13,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:13,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052460893] [2021-07-09 17:31:13,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:13,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:13,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:13,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:13,215 INFO L87 Difference]: Start difference. First operand 219 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:13,662 INFO L93 Difference]: Finished difference Result 250 states and 554 transitions. [2021-07-09 17:31:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:13,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:13,663 INFO L225 Difference]: With dead ends: 250 [2021-07-09 17:31:13,663 INFO L226 Difference]: Without dead ends: 250 [2021-07-09 17:31:13,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 520.3ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:31:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-09 17:31:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 219. [2021-07-09 17:31:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-07-09 17:31:13,666 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-07-09 17:31:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:13,666 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-07-09 17:31:13,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-07-09 17:31:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:13,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:13,666 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:13,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2371,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:13,873 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:13,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1530947719, now seen corresponding path program 304 times [2021-07-09 17:31:13,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:13,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789827261] [2021-07-09 17:31:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:13,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:13,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789827261] [2021-07-09 17:31:13,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789827261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:13,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345682447] [2021-07-09 17:31:13,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:13,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:13,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:13,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:13,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:14,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345682447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:14,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:14,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:14,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070072007] [2021-07-09 17:31:14,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:14,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:14,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:14,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:14,184 INFO L87 Difference]: Start difference. First operand 219 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:14,723 INFO L93 Difference]: Finished difference Result 255 states and 563 transitions. [2021-07-09 17:31:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:14,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:14,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:14,723 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:31:14,723 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:31:14,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 573.9ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:31:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:31:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2021-07-09 17:31:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-07-09 17:31:14,726 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-07-09 17:31:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:14,726 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-07-09 17:31:14,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:14,726 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-07-09 17:31:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:14,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:14,726 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:14,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-07-09 17:31:14,934 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:14,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1967283825, now seen corresponding path program 305 times [2021-07-09 17:31:14,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:14,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563318133] [2021-07-09 17:31:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:15,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:15,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563318133] [2021-07-09 17:31:15,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563318133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:15,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773997005] [2021-07-09 17:31:15,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:15,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:15,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:15,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:15,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:15,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773997005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:15,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:15,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:15,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893129817] [2021-07-09 17:31:15,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:15,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:15,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:15,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:15,244 INFO L87 Difference]: Start difference. First operand 219 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:16,020 INFO L93 Difference]: Finished difference Result 289 states and 617 transitions. [2021-07-09 17:31:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:31:16,021 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:16,021 INFO L225 Difference]: With dead ends: 289 [2021-07-09 17:31:16,021 INFO L226 Difference]: Without dead ends: 289 [2021-07-09 17:31:16,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 830.1ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:31:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-07-09 17:31:16,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 220. [2021-07-09 17:31:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2648401826484017) internal successors, (496), 219 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 496 transitions. [2021-07-09 17:31:16,024 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 496 transitions. Word has length 19 [2021-07-09 17:31:16,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:16,024 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 496 transitions. [2021-07-09 17:31:16,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 496 transitions. [2021-07-09 17:31:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:16,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:16,024 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:16,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2381,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:16,241 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:16,241 INFO L82 PathProgramCache]: Analyzing trace with hash -839887732, now seen corresponding path program 306 times [2021-07-09 17:31:16,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:16,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132184602] [2021-07-09 17:31:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:16,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:16,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132184602] [2021-07-09 17:31:16,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132184602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134871435] [2021-07-09 17:31:16,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:16,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:16,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:16,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:16,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:16,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134871435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:16,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:16,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:16,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425956065] [2021-07-09 17:31:16,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:16,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:16,606 INFO L87 Difference]: Start difference. First operand 220 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:16,890 INFO L93 Difference]: Finished difference Result 246 states and 545 transitions. [2021-07-09 17:31:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:16,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:16,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:16,890 INFO L225 Difference]: With dead ends: 246 [2021-07-09 17:31:16,891 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 17:31:16,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 430.5ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:16,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 17:31:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 220. [2021-07-09 17:31:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-09 17:31:16,893 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-09 17:31:16,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:16,893 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-09 17:31:16,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:16,893 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-09 17:31:16,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:16,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:16,893 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:17,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2388 [2021-07-09 17:31:17,094 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:17,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:17,094 INFO L82 PathProgramCache]: Analyzing trace with hash -425566935, now seen corresponding path program 307 times [2021-07-09 17:31:17,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:17,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580875975] [2021-07-09 17:31:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:17,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:17,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580875975] [2021-07-09 17:31:17,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580875975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287054316] [2021-07-09 17:31:17,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:17,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:17,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:17,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287054316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:17,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:17,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516986651] [2021-07-09 17:31:17,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:17,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:17,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:17,378 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:17,553 INFO L93 Difference]: Finished difference Result 242 states and 539 transitions. [2021-07-09 17:31:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:17,554 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:17,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:17,554 INFO L225 Difference]: With dead ends: 242 [2021-07-09 17:31:17,554 INFO L226 Difference]: Without dead ends: 242 [2021-07-09 17:31:17,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:17,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-09 17:31:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 220. [2021-07-09 17:31:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-09 17:31:17,556 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-09 17:31:17,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:17,556 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-09 17:31:17,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-09 17:31:17,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:17,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:17,557 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:17,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:17,757 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:17,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1496562399, now seen corresponding path program 308 times [2021-07-09 17:31:17,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:17,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136212238] [2021-07-09 17:31:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:17,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:17,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136212238] [2021-07-09 17:31:17,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136212238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:17,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935302876] [2021-07-09 17:31:17,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:17,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:17,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:17,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:17,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:18,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935302876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:18,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:18,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:18,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459340961] [2021-07-09 17:31:18,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:18,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:18,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:18,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:18,047 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:18,500 INFO L93 Difference]: Finished difference Result 256 states and 566 transitions. [2021-07-09 17:31:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:18,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:18,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:18,501 INFO L225 Difference]: With dead ends: 256 [2021-07-09 17:31:18,501 INFO L226 Difference]: Without dead ends: 256 [2021-07-09 17:31:18,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 488.2ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-07-09 17:31:18,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 220. [2021-07-09 17:31:18,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-09 17:31:18,503 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-09 17:31:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:18,503 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-09 17:31:18,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:18,506 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-09 17:31:18,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:18,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:18,507 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:18,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2401 [2021-07-09 17:31:18,707 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:18,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:18,707 INFO L82 PathProgramCache]: Analyzing trace with hash 670319846, now seen corresponding path program 309 times [2021-07-09 17:31:18,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:18,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76913357] [2021-07-09 17:31:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:18,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:18,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76913357] [2021-07-09 17:31:18,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76913357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:18,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022865788] [2021-07-09 17:31:18,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:18,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:18,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:18,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:18,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:19,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022865788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:19,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:19,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244495571] [2021-07-09 17:31:19,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:19,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:19,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:19,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:19,034 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:19,361 INFO L93 Difference]: Finished difference Result 272 states and 582 transitions. [2021-07-09 17:31:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:19,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:19,362 INFO L225 Difference]: With dead ends: 272 [2021-07-09 17:31:19,362 INFO L226 Difference]: Without dead ends: 264 [2021-07-09 17:31:19,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:19,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-09 17:31:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 224. [2021-07-09 17:31:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2690582959641254) internal successors, (506), 223 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 506 transitions. [2021-07-09 17:31:19,364 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 506 transitions. Word has length 19 [2021-07-09 17:31:19,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:19,364 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 506 transitions. [2021-07-09 17:31:19,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 506 transitions. [2021-07-09 17:31:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:19,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:19,365 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:19,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:19,565 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:19,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:19,566 INFO L82 PathProgramCache]: Analyzing trace with hash -699826647, now seen corresponding path program 310 times [2021-07-09 17:31:19,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:19,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391334702] [2021-07-09 17:31:19,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:19,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:19,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391334702] [2021-07-09 17:31:19,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391334702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871875266] [2021-07-09 17:31:19,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:19,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:19,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:19,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:19,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871875266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:19,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:19,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:19,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780720011] [2021-07-09 17:31:19,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:19,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:19,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:19,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:19,868 INFO L87 Difference]: Start difference. First operand 224 states and 506 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:20,351 INFO L93 Difference]: Finished difference Result 265 states and 584 transitions. [2021-07-09 17:31:20,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:20,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:20,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:20,352 INFO L225 Difference]: With dead ends: 265 [2021-07-09 17:31:20,352 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:31:20,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 536.6ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:20,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:31:20,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 224. [2021-07-09 17:31:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2645739910313902) internal successors, (505), 223 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 505 transitions. [2021-07-09 17:31:20,354 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 505 transitions. Word has length 19 [2021-07-09 17:31:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:20,354 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 505 transitions. [2021-07-09 17:31:20,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 505 transitions. [2021-07-09 17:31:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:20,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:20,355 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:20,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2413,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:20,555 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:20,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:20,555 INFO L82 PathProgramCache]: Analyzing trace with hash 427569446, now seen corresponding path program 311 times [2021-07-09 17:31:20,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:20,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451872516] [2021-07-09 17:31:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:20,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:20,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451872516] [2021-07-09 17:31:20,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451872516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:20,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935125839] [2021-07-09 17:31:20,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:20,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:31:20,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:20,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:31:20,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:20,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935125839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:20,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:20,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:20,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391935332] [2021-07-09 17:31:20,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:20,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:20,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:20,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:20,888 INFO L87 Difference]: Start difference. First operand 224 states and 505 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:21,090 INFO L93 Difference]: Finished difference Result 242 states and 539 transitions. [2021-07-09 17:31:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:31:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:21,091 INFO L225 Difference]: With dead ends: 242 [2021-07-09 17:31:21,091 INFO L226 Difference]: Without dead ends: 242 [2021-07-09 17:31:21,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-09 17:31:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 218. [2021-07-09 17:31:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-07-09 17:31:21,093 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-07-09 17:31:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:21,093 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-07-09 17:31:21,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-07-09 17:31:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:21,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:21,093 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:21,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2420 [2021-07-09 17:31:21,294 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:21,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1315269959, now seen corresponding path program 312 times [2021-07-09 17:31:21,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:21,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414085736] [2021-07-09 17:31:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:21,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414085736] [2021-07-09 17:31:21,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414085736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182972691] [2021-07-09 17:31:21,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:21,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:21,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:21,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182972691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:21,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:21,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833448871] [2021-07-09 17:31:21,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:21,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:21,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:21,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:21,600 INFO L87 Difference]: Start difference. First operand 218 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:21,805 INFO L93 Difference]: Finished difference Result 243 states and 540 transitions. [2021-07-09 17:31:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:21,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:21,806 INFO L225 Difference]: With dead ends: 243 [2021-07-09 17:31:21,806 INFO L226 Difference]: Without dead ends: 243 [2021-07-09 17:31:21,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:21,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-09 17:31:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 218. [2021-07-09 17:31:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-07-09 17:31:21,808 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-07-09 17:31:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:21,808 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-07-09 17:31:21,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-07-09 17:31:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:21,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:21,808 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:22,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2428,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:22,009 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2112005711, now seen corresponding path program 313 times [2021-07-09 17:31:22,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:22,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8326520] [2021-07-09 17:31:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:22,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:22,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8326520] [2021-07-09 17:31:22,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8326520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:22,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965750797] [2021-07-09 17:31:22,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:22,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:22,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:22,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965750797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:22,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:22,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:22,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151034698] [2021-07-09 17:31:22,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:22,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:22,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:22,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:22,305 INFO L87 Difference]: Start difference. First operand 218 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:22,607 INFO L93 Difference]: Finished difference Result 249 states and 552 transitions. [2021-07-09 17:31:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:22,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:22,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:22,607 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:31:22,607 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 17:31:22,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 17:31:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 218. [2021-07-09 17:31:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-07-09 17:31:22,610 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-07-09 17:31:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:22,610 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-07-09 17:31:22,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:22,610 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-07-09 17:31:22,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:22,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:22,610 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:22,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2433 [2021-07-09 17:31:22,811 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:22,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:22,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1895411350, now seen corresponding path program 314 times [2021-07-09 17:31:22,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:22,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569174768] [2021-07-09 17:31:22,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:22,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:22,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569174768] [2021-07-09 17:31:22,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569174768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:22,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674478772] [2021-07-09 17:31:22,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:22,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:22,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:22,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:22,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:23,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674478772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:23,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:23,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:23,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446109848] [2021-07-09 17:31:23,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:23,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:23,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:23,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:23,142 INFO L87 Difference]: Start difference. First operand 218 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:23,305 INFO L93 Difference]: Finished difference Result 238 states and 530 transitions. [2021-07-09 17:31:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:23,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:23,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:23,306 INFO L225 Difference]: With dead ends: 238 [2021-07-09 17:31:23,306 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:31:23,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 309.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:31:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 215. [2021-07-09 17:31:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-09 17:31:23,308 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-09 17:31:23,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:23,308 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-09 17:31:23,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:23,308 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-09 17:31:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:23,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:23,309 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:23,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2440,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:23,509 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:23,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:23,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1676615319, now seen corresponding path program 315 times [2021-07-09 17:31:23,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:23,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135810727] [2021-07-09 17:31:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:23,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:23,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135810727] [2021-07-09 17:31:23,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135810727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:23,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702098126] [2021-07-09 17:31:23,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:23,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:23,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:23,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:23,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:23,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702098126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:23,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:23,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:23,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001684340] [2021-07-09 17:31:23,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:23,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:23,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:23,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:23,875 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:24,163 INFO L93 Difference]: Finished difference Result 249 states and 541 transitions. [2021-07-09 17:31:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:24,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:24,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:24,164 INFO L225 Difference]: With dead ends: 249 [2021-07-09 17:31:24,164 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 17:31:24,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 17:31:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 226. [2021-07-09 17:31:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2355555555555555) internal successors, (503), 225 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 503 transitions. [2021-07-09 17:31:24,166 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 503 transitions. Word has length 19 [2021-07-09 17:31:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:24,166 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 503 transitions. [2021-07-09 17:31:24,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,166 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 503 transitions. [2021-07-09 17:31:24,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:24,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:24,167 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:24,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2448,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:24,367 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:24,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1389065084, now seen corresponding path program 316 times [2021-07-09 17:31:24,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:24,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460468205] [2021-07-09 17:31:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:24,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:24,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460468205] [2021-07-09 17:31:24,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460468205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:24,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398497065] [2021-07-09 17:31:24,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:24,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:24,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:24,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:24,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:24,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398497065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:24,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:24,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:24,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251491813] [2021-07-09 17:31:24,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:24,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:24,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:24,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:24,666 INFO L87 Difference]: Start difference. First operand 226 states and 503 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:24,997 INFO L93 Difference]: Finished difference Result 311 states and 659 transitions. [2021-07-09 17:31:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:24,998 INFO L225 Difference]: With dead ends: 311 [2021-07-09 17:31:24,998 INFO L226 Difference]: Without dead ends: 311 [2021-07-09 17:31:24,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:24,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-09 17:31:25,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 227. [2021-07-09 17:31:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.247787610619469) internal successors, (508), 226 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 508 transitions. [2021-07-09 17:31:25,000 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 508 transitions. Word has length 19 [2021-07-09 17:31:25,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:25,001 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 508 transitions. [2021-07-09 17:31:25,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,001 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 508 transitions. [2021-07-09 17:31:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:25,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:25,001 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:25,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2456 [2021-07-09 17:31:25,201 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:25,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:25,202 INFO L82 PathProgramCache]: Analyzing trace with hash 945866887, now seen corresponding path program 317 times [2021-07-09 17:31:25,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:25,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541263573] [2021-07-09 17:31:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:25,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:25,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541263573] [2021-07-09 17:31:25,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541263573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:25,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661594749] [2021-07-09 17:31:25,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:25,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:31:25,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:25,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:25,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:25,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661594749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:25,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:25,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:25,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884414764] [2021-07-09 17:31:25,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:25,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:25,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:25,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:25,565 INFO L87 Difference]: Start difference. First operand 227 states and 508 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:25,744 INFO L93 Difference]: Finished difference Result 236 states and 524 transitions. [2021-07-09 17:31:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:25,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:25,744 INFO L225 Difference]: With dead ends: 236 [2021-07-09 17:31:25,745 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:31:25,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:25,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:31:25,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 218. [2021-07-09 17:31:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2672811059907834) internal successors, (492), 217 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 492 transitions. [2021-07-09 17:31:25,747 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 492 transitions. Word has length 19 [2021-07-09 17:31:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:25,747 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 492 transitions. [2021-07-09 17:31:25,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 492 transitions. [2021-07-09 17:31:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:25,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:25,747 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:25,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2463 [2021-07-09 17:31:25,948 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:25,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:25,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1087074804, now seen corresponding path program 318 times [2021-07-09 17:31:25,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:25,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425374600] [2021-07-09 17:31:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:26,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425374600] [2021-07-09 17:31:26,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425374600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85839463] [2021-07-09 17:31:26,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:26,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:31:26,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:26,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:26,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85839463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:26,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:26,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546439477] [2021-07-09 17:31:26,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:26,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:26,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:26,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:26,256 INFO L87 Difference]: Start difference. First operand 218 states and 492 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:26,421 INFO L93 Difference]: Finished difference Result 252 states and 558 transitions. [2021-07-09 17:31:26,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:26,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:26,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:26,422 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:31:26,422 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:31:26,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:26,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:31:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 213. [2021-07-09 17:31:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.259433962264151) internal successors, (479), 212 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 479 transitions. [2021-07-09 17:31:26,424 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 479 transitions. Word has length 19 [2021-07-09 17:31:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:26,424 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 479 transitions. [2021-07-09 17:31:26,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 479 transitions. [2021-07-09 17:31:26,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:26,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:26,424 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:26,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2471 [2021-07-09 17:31:26,625 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:26,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:26,625 INFO L82 PathProgramCache]: Analyzing trace with hash 210899919, now seen corresponding path program 319 times [2021-07-09 17:31:26,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:26,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197894405] [2021-07-09 17:31:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:26,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197894405] [2021-07-09 17:31:26,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197894405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929531005] [2021-07-09 17:31:26,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:26,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:31:26,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:26,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929531005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:26,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:26,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:26,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104773444] [2021-07-09 17:31:26,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:26,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:26,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:26,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:26,999 INFO L87 Difference]: Start difference. First operand 213 states and 479 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:27,168 INFO L93 Difference]: Finished difference Result 236 states and 525 transitions. [2021-07-09 17:31:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:27,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:27,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:27,169 INFO L225 Difference]: With dead ends: 236 [2021-07-09 17:31:27,169 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:31:27,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 290.1ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:31:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 214. [2021-07-09 17:31:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-07-09 17:31:27,171 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-07-09 17:31:27,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:27,171 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-07-09 17:31:27,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:27,171 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-07-09 17:31:27,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:27,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:27,171 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:27,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2476 [2021-07-09 17:31:27,372 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:27,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:27,372 INFO L82 PathProgramCache]: Analyzing trace with hash -860095545, now seen corresponding path program 320 times [2021-07-09 17:31:27,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:27,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290132689] [2021-07-09 17:31:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:27,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:27,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290132689] [2021-07-09 17:31:27,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290132689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:27,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449189831] [2021-07-09 17:31:27,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:27,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:27,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:27,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:27,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:27,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449189831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:27,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:27,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:27,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407568805] [2021-07-09 17:31:27,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:27,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:27,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:27,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:27,669 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:28,018 INFO L93 Difference]: Finished difference Result 252 states and 557 transitions. [2021-07-09 17:31:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:28,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:28,018 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:31:28,018 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:31:28,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 429.0ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:28,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:31:28,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 215. [2021-07-09 17:31:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-09 17:31:28,021 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-09 17:31:28,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:28,021 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-09 17:31:28,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-09 17:31:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:28,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:28,021 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:28,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2480,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:28,221 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:28,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:28,222 INFO L82 PathProgramCache]: Analyzing trace with hash -63359793, now seen corresponding path program 321 times [2021-07-09 17:31:28,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:28,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074997058] [2021-07-09 17:31:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:28,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:28,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074997058] [2021-07-09 17:31:28,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074997058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:28,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125420510] [2021-07-09 17:31:28,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:28,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:28,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:28,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:28,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:28,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125420510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:28,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:28,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:28,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285263345] [2021-07-09 17:31:28,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:28,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:28,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:28,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:28,518 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:28,972 INFO L93 Difference]: Finished difference Result 263 states and 576 transitions. [2021-07-09 17:31:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:28,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:28,973 INFO L225 Difference]: With dead ends: 263 [2021-07-09 17:31:28,973 INFO L226 Difference]: Without dead ends: 260 [2021-07-09 17:31:28,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 520.2ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-09 17:31:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 216. [2021-07-09 17:31:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.26046511627907) internal successors, (486), 215 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 486 transitions. [2021-07-09 17:31:28,975 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 486 transitions. Word has length 19 [2021-07-09 17:31:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:28,976 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 486 transitions. [2021-07-09 17:31:28,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:28,976 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 486 transitions. [2021-07-09 17:31:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:28,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:28,976 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:29,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2485 [2021-07-09 17:31:29,176 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:29,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:29,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1064036300, now seen corresponding path program 322 times [2021-07-09 17:31:29,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:29,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4179848] [2021-07-09 17:31:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:29,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:29,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4179848] [2021-07-09 17:31:29,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4179848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:29,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712727415] [2021-07-09 17:31:29,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:29,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:29,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:29,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:29,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:29,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712727415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:29,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:29,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:29,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368770071] [2021-07-09 17:31:29,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:29,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:29,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:29,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:29,521 INFO L87 Difference]: Start difference. First operand 216 states and 486 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:29,926 INFO L93 Difference]: Finished difference Result 265 states and 576 transitions. [2021-07-09 17:31:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:31:29,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:29,926 INFO L225 Difference]: With dead ends: 265 [2021-07-09 17:31:29,926 INFO L226 Difference]: Without dead ends: 265 [2021-07-09 17:31:29,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 492.1ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-09 17:31:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 214. [2021-07-09 17:31:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-07-09 17:31:29,929 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-07-09 17:31:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:29,929 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-07-09 17:31:29,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-07-09 17:31:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:29,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:29,929 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:30,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2492,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:30,129 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:30,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:30,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1951736813, now seen corresponding path program 323 times [2021-07-09 17:31:30,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:30,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146108088] [2021-07-09 17:31:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:30,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:30,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146108088] [2021-07-09 17:31:30,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146108088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87994311] [2021-07-09 17:31:30,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:30,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:31:30,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:30,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:30,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:30,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87994311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:30,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:30,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269060483] [2021-07-09 17:31:30,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:30,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:30,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:30,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:30,444 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:30,655 INFO L93 Difference]: Finished difference Result 239 states and 531 transitions. [2021-07-09 17:31:30,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:31:30,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:30,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:30,656 INFO L225 Difference]: With dead ends: 239 [2021-07-09 17:31:30,656 INFO L226 Difference]: Without dead ends: 239 [2021-07-09 17:31:30,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-07-09 17:31:30,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 214. [2021-07-09 17:31:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-07-09 17:31:30,658 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-07-09 17:31:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:30,658 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-07-09 17:31:30,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-07-09 17:31:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:30,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:30,658 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:30,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2500 [2021-07-09 17:31:30,859 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:30,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:30,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1546494731, now seen corresponding path program 324 times [2021-07-09 17:31:30,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:30,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246196873] [2021-07-09 17:31:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:30,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:30,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246196873] [2021-07-09 17:31:30,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246196873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:30,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447814610] [2021-07-09 17:31:30,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:31,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:31,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:31,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:31:31,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:31,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447814610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:31,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:31,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:31,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515519192] [2021-07-09 17:31:31,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:31,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:31,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:31,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:31,177 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:31,530 INFO L93 Difference]: Finished difference Result 251 states and 555 transitions. [2021-07-09 17:31:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:31,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:31,531 INFO L225 Difference]: With dead ends: 251 [2021-07-09 17:31:31,531 INFO L226 Difference]: Without dead ends: 251 [2021-07-09 17:31:31,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 413.4ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-09 17:31:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 214. [2021-07-09 17:31:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-07-09 17:31:31,533 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-07-09 17:31:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:31,533 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-07-09 17:31:31,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-07-09 17:31:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:31,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:31,534 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:31,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2505,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:31,734 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:31,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:31,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1258944496, now seen corresponding path program 325 times [2021-07-09 17:31:31,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:31,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614974031] [2021-07-09 17:31:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:31,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:31,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614974031] [2021-07-09 17:31:31,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614974031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:31,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85842905] [2021-07-09 17:31:31,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:31,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:31,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:32,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85842905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:32,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:32,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289324679] [2021-07-09 17:31:32,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:32,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:32,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:32,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:32,075 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:32,311 INFO L93 Difference]: Finished difference Result 234 states and 520 transitions. [2021-07-09 17:31:32,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:32,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:32,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:32,312 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:31:32,312 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:31:32,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:32,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:31:32,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 211. [2021-07-09 17:31:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-07-09 17:31:32,314 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-07-09 17:31:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:32,314 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-07-09 17:31:32,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-07-09 17:31:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:32,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:32,314 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:32,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2513 [2021-07-09 17:31:32,515 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:32,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:32,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1040148465, now seen corresponding path program 326 times [2021-07-09 17:31:32,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:32,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303886306] [2021-07-09 17:31:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:32,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:32,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303886306] [2021-07-09 17:31:32,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303886306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108183721] [2021-07-09 17:31:32,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:32,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:32,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:32,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:32,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:32,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108183721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:32,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:32,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206052960] [2021-07-09 17:31:32,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:32,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:32,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:32,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:32,881 INFO L87 Difference]: Start difference. First operand 211 states and 473 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:33,085 INFO L93 Difference]: Finished difference Result 245 states and 534 transitions. [2021-07-09 17:31:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:33,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:33,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:33,086 INFO L225 Difference]: With dead ends: 245 [2021-07-09 17:31:33,086 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:31:33,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:33,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:31:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2021-07-09 17:31:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2547169811320753) internal successors, (478), 212 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 478 transitions. [2021-07-09 17:31:33,088 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 478 transitions. Word has length 19 [2021-07-09 17:31:33,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:33,089 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 478 transitions. [2021-07-09 17:31:33,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 478 transitions. [2021-07-09 17:31:33,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:33,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:33,089 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:33,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2521 [2021-07-09 17:31:33,289 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash -752598230, now seen corresponding path program 327 times [2021-07-09 17:31:33,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:33,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244272064] [2021-07-09 17:31:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:33,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:33,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244272064] [2021-07-09 17:31:33,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244272064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:33,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680748001] [2021-07-09 17:31:33,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:33,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:31:33,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:33,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:33,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680748001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:33,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:33,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:33,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520656209] [2021-07-09 17:31:33,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:33,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:33,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:33,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:33,627 INFO L87 Difference]: Start difference. First operand 213 states and 478 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:33,938 INFO L93 Difference]: Finished difference Result 304 states and 644 transitions. [2021-07-09 17:31:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:33,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:33,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:33,938 INFO L225 Difference]: With dead ends: 304 [2021-07-09 17:31:33,938 INFO L226 Difference]: Without dead ends: 304 [2021-07-09 17:31:33,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 376.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:33,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-07-09 17:31:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 214. [2021-07-09 17:31:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.267605633802817) internal successors, (483), 213 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 483 transitions. [2021-07-09 17:31:33,941 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 483 transitions. Word has length 19 [2021-07-09 17:31:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:33,941 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 483 transitions. [2021-07-09 17:31:33,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 483 transitions. [2021-07-09 17:31:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:33,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:33,941 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:34,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:34,142 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:34,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:34,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1582333741, now seen corresponding path program 328 times [2021-07-09 17:31:34,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:34,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554523446] [2021-07-09 17:31:34,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:34,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:34,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554523446] [2021-07-09 17:31:34,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554523446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024575696] [2021-07-09 17:31:34,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:34,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:34,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:34,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:34,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:34,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024575696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:34,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:34,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149486273] [2021-07-09 17:31:34,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:34,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:34,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:34,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:34,511 INFO L87 Difference]: Start difference. First operand 214 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:34,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:34,674 INFO L93 Difference]: Finished difference Result 232 states and 514 transitions. [2021-07-09 17:31:34,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:34,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:34,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:34,674 INFO L225 Difference]: With dead ends: 232 [2021-07-09 17:31:34,674 INFO L226 Difference]: Without dead ends: 226 [2021-07-09 17:31:34,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-09 17:31:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 214. [2021-07-09 17:31:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2629107981220655) internal successors, (482), 213 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 482 transitions. [2021-07-09 17:31:34,676 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 482 transitions. Word has length 19 [2021-07-09 17:31:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:34,676 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 482 transitions. [2021-07-09 17:31:34,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:34,677 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 482 transitions. [2021-07-09 17:31:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:34,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:34,677 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:34,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2536 [2021-07-09 17:31:34,877 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:34,878 INFO L82 PathProgramCache]: Analyzing trace with hash -450607950, now seen corresponding path program 329 times [2021-07-09 17:31:34,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:34,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120171131] [2021-07-09 17:31:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:34,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:34,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120171131] [2021-07-09 17:31:34,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120171131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:34,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703932341] [2021-07-09 17:31:34,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:35,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:35,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:35,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:35,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:35,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703932341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:35,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:35,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:35,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092160915] [2021-07-09 17:31:35,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:35,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:35,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:35,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:35,184 INFO L87 Difference]: Start difference. First operand 214 states and 482 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:35,365 INFO L93 Difference]: Finished difference Result 248 states and 548 transitions. [2021-07-09 17:31:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:35,366 INFO L225 Difference]: With dead ends: 248 [2021-07-09 17:31:35,366 INFO L226 Difference]: Without dead ends: 248 [2021-07-09 17:31:35,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:35,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-09 17:31:35,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 210. [2021-07-09 17:31:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-07-09 17:31:35,368 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-07-09 17:31:35,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:35,368 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-07-09 17:31:35,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-07-09 17:31:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:35,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:35,369 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:35,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2544 [2021-07-09 17:31:35,585 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:35,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1075773305, now seen corresponding path program 330 times [2021-07-09 17:31:35,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:35,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266168715] [2021-07-09 17:31:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:35,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:35,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266168715] [2021-07-09 17:31:35,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266168715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:35,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377974915] [2021-07-09 17:31:35,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:35,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:31:35,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:35,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:35,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:35,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377974915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:35,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:35,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:35,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117747249] [2021-07-09 17:31:35,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:35,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:35,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:35,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:35,901 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:36,090 INFO L93 Difference]: Finished difference Result 242 states and 535 transitions. [2021-07-09 17:31:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:36,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:36,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:36,090 INFO L225 Difference]: With dead ends: 242 [2021-07-09 17:31:36,090 INFO L226 Difference]: Without dead ends: 242 [2021-07-09 17:31:36,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-09 17:31:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 211. [2021-07-09 17:31:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-07-09 17:31:36,093 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-07-09 17:31:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:36,093 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-07-09 17:31:36,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-07-09 17:31:36,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:36,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:36,093 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:36,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2549 [2021-07-09 17:31:36,294 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:36,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:36,294 INFO L82 PathProgramCache]: Analyzing trace with hash -279037553, now seen corresponding path program 331 times [2021-07-09 17:31:36,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:36,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225202570] [2021-07-09 17:31:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:36,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:36,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225202570] [2021-07-09 17:31:36,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225202570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:36,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763799621] [2021-07-09 17:31:36,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:36,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:36,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:36,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763799621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:36,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:36,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:36,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944505768] [2021-07-09 17:31:36,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:36,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:36,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:36,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:36,606 INFO L87 Difference]: Start difference. First operand 211 states and 473 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:36,885 INFO L93 Difference]: Finished difference Result 258 states and 564 transitions. [2021-07-09 17:31:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:36,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:36,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:36,885 INFO L225 Difference]: With dead ends: 258 [2021-07-09 17:31:36,885 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:31:36,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:31:36,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 212. [2021-07-09 17:31:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.255924170616114) internal successors, (476), 211 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 476 transitions. [2021-07-09 17:31:36,888 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 476 transitions. Word has length 19 [2021-07-09 17:31:36,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:36,888 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 476 transitions. [2021-07-09 17:31:36,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 476 transitions. [2021-07-09 17:31:36,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:36,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:36,888 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:37,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2554 [2021-07-09 17:31:37,089 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:37,089 INFO L82 PathProgramCache]: Analyzing trace with hash 848358540, now seen corresponding path program 332 times [2021-07-09 17:31:37,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:37,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049551980] [2021-07-09 17:31:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:37,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:37,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049551980] [2021-07-09 17:31:37,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049551980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:37,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940213212] [2021-07-09 17:31:37,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:37,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:37,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:37,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:37,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:37,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940213212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:37,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:37,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:37,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815485248] [2021-07-09 17:31:37,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:37,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:37,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:37,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:37,437 INFO L87 Difference]: Start difference. First operand 212 states and 476 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:38,097 INFO L93 Difference]: Finished difference Result 349 states and 723 transitions. [2021-07-09 17:31:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:31:38,097 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:38,097 INFO L225 Difference]: With dead ends: 349 [2021-07-09 17:31:38,097 INFO L226 Difference]: Without dead ends: 349 [2021-07-09 17:31:38,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 744.7ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:31:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-07-09 17:31:38,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 216. [2021-07-09 17:31:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2837209302325583) internal successors, (491), 215 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 491 transitions. [2021-07-09 17:31:38,100 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 491 transitions. Word has length 19 [2021-07-09 17:31:38,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:38,100 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 491 transitions. [2021-07-09 17:31:38,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:38,100 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 491 transitions. [2021-07-09 17:31:38,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:38,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:38,101 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:38,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2561,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:38,301 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:38,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:38,301 INFO L82 PathProgramCache]: Analyzing trace with hash 227308713, now seen corresponding path program 333 times [2021-07-09 17:31:38,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:38,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929554678] [2021-07-09 17:31:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:38,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:38,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929554678] [2021-07-09 17:31:38,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929554678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:38,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569291146] [2021-07-09 17:31:38,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:38,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:31:38,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:38,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:38,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:38,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569291146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:38,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:38,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:38,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109880436] [2021-07-09 17:31:38,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:38,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:38,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:38,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:38,678 INFO L87 Difference]: Start difference. First operand 216 states and 491 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:39,053 INFO L93 Difference]: Finished difference Result 239 states and 532 transitions. [2021-07-09 17:31:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:39,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:39,054 INFO L225 Difference]: With dead ends: 239 [2021-07-09 17:31:39,054 INFO L226 Difference]: Without dead ends: 233 [2021-07-09 17:31:39,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 504.6ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:31:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-07-09 17:31:39,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-07-09 17:31:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2790697674418605) internal successors, (490), 215 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 490 transitions. [2021-07-09 17:31:39,056 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 490 transitions. Word has length 19 [2021-07-09 17:31:39,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:39,056 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 490 transitions. [2021-07-09 17:31:39,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,056 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 490 transitions. [2021-07-09 17:31:39,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:39,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:39,056 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:39,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2569,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:39,257 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:39,257 INFO L82 PathProgramCache]: Analyzing trace with hash 514858948, now seen corresponding path program 334 times [2021-07-09 17:31:39,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:39,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008743828] [2021-07-09 17:31:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:39,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:39,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008743828] [2021-07-09 17:31:39,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008743828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:39,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374196163] [2021-07-09 17:31:39,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:39,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:39,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:39,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:39,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:39,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374196163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:39,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:39,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:39,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111119355] [2021-07-09 17:31:39,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:39,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:39,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:39,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:39,568 INFO L87 Difference]: Start difference. First operand 216 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:39,981 INFO L93 Difference]: Finished difference Result 293 states and 629 transitions. [2021-07-09 17:31:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:39,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:39,982 INFO L225 Difference]: With dead ends: 293 [2021-07-09 17:31:39,982 INFO L226 Difference]: Without dead ends: 293 [2021-07-09 17:31:39,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 475.9ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:39,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-07-09 17:31:39,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 213. [2021-07-09 17:31:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2641509433962264) internal successors, (480), 212 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-07-09 17:31:39,985 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-07-09 17:31:39,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:39,985 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-07-09 17:31:39,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:39,985 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-07-09 17:31:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:39,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:39,985 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:40,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2577 [2021-07-09 17:31:40,186 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:40,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:40,186 INFO L82 PathProgramCache]: Analyzing trace with hash 816849228, now seen corresponding path program 335 times [2021-07-09 17:31:40,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:40,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997274549] [2021-07-09 17:31:40,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:40,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:40,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997274549] [2021-07-09 17:31:40,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997274549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:40,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783356564] [2021-07-09 17:31:40,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:40,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:40,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:40,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:40,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:40,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783356564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:40,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:40,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:40,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722715568] [2021-07-09 17:31:40,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:40,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:40,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:40,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:40,506 INFO L87 Difference]: Start difference. First operand 213 states and 480 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:40,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:40,750 INFO L93 Difference]: Finished difference Result 250 states and 552 transitions. [2021-07-09 17:31:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:40,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:40,751 INFO L225 Difference]: With dead ends: 250 [2021-07-09 17:31:40,751 INFO L226 Difference]: Without dead ends: 250 [2021-07-09 17:31:40,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:40,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-09 17:31:40,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 210. [2021-07-09 17:31:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-07-09 17:31:40,753 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-07-09 17:31:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:40,753 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-07-09 17:31:40,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:40,753 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-07-09 17:31:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:40,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:40,754 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:40,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2584,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:40,954 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:40,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:40,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1255826225, now seen corresponding path program 336 times [2021-07-09 17:31:40,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:40,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934324441] [2021-07-09 17:31:40,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:41,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:41,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934324441] [2021-07-09 17:31:41,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934324441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:41,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127122079] [2021-07-09 17:31:41,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:41,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:31:41,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:41,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:41,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:41,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127122079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:41,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:41,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:41,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155883599] [2021-07-09 17:31:41,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:41,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:41,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:41,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:41,328 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:41,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:41,683 INFO L93 Difference]: Finished difference Result 251 states and 546 transitions. [2021-07-09 17:31:41,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:41,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:41,684 INFO L225 Difference]: With dead ends: 251 [2021-07-09 17:31:41,684 INFO L226 Difference]: Without dead ends: 251 [2021-07-09 17:31:41,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 486.4ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:41,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-09 17:31:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 213. [2021-07-09 17:31:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.259433962264151) internal successors, (479), 212 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 479 transitions. [2021-07-09 17:31:41,686 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 479 transitions. Word has length 19 [2021-07-09 17:31:41,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:41,686 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 479 transitions. [2021-07-09 17:31:41,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:41,686 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 479 transitions. [2021-07-09 17:31:41,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:41,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:41,687 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:41,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2589 [2021-07-09 17:31:41,893 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:41,893 INFO L82 PathProgramCache]: Analyzing trace with hash -968275990, now seen corresponding path program 337 times [2021-07-09 17:31:41,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:41,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151147907] [2021-07-09 17:31:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:41,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:41,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151147907] [2021-07-09 17:31:41,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151147907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:41,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742362659] [2021-07-09 17:31:41,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:42,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:42,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:42,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742362659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:42,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:42,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:42,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402403907] [2021-07-09 17:31:42,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:42,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:42,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:42,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:42,190 INFO L87 Difference]: Start difference. First operand 213 states and 479 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:42,793 INFO L93 Difference]: Finished difference Result 303 states and 647 transitions. [2021-07-09 17:31:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:31:42,793 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:42,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:42,794 INFO L225 Difference]: With dead ends: 303 [2021-07-09 17:31:42,794 INFO L226 Difference]: Without dead ends: 303 [2021-07-09 17:31:42,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 571.1ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:42,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-07-09 17:31:42,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 215. [2021-07-09 17:31:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2757009345794392) internal successors, (487), 214 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 487 transitions. [2021-07-09 17:31:42,796 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 487 transitions. Word has length 19 [2021-07-09 17:31:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:42,796 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 487 transitions. [2021-07-09 17:31:42,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:42,797 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 487 transitions. [2021-07-09 17:31:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:42,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:42,797 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:42,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2597 [2021-07-09 17:31:42,997 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:42,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:42,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1366655981, now seen corresponding path program 338 times [2021-07-09 17:31:42,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:42,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551351851] [2021-07-09 17:31:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:43,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:43,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551351851] [2021-07-09 17:31:43,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551351851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:43,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490792067] [2021-07-09 17:31:43,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:43,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:43,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:43,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:43,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:43,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490792067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:43,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:43,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:43,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406307930] [2021-07-09 17:31:43,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:43,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:43,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:43,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:43,369 INFO L87 Difference]: Start difference. First operand 215 states and 487 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:43,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:43,716 INFO L93 Difference]: Finished difference Result 239 states and 529 transitions. [2021-07-09 17:31:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:43,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:43,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:43,716 INFO L225 Difference]: With dead ends: 239 [2021-07-09 17:31:43,716 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:31:43,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 488.9ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:31:43,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 215. [2021-07-09 17:31:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2663551401869158) internal successors, (485), 214 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:43,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 485 transitions. [2021-07-09 17:31:43,719 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 485 transitions. Word has length 19 [2021-07-09 17:31:43,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:43,719 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 485 transitions. [2021-07-09 17:31:43,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:43,719 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 485 transitions. [2021-07-09 17:31:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:43,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:43,719 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:43,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2604,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:43,919 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:43,920 INFO L82 PathProgramCache]: Analyzing trace with hash -666285710, now seen corresponding path program 339 times [2021-07-09 17:31:43,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:43,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228976910] [2021-07-09 17:31:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:44,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:44,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228976910] [2021-07-09 17:31:44,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228976910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:44,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212697337] [2021-07-09 17:31:44,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:44,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:44,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:44,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:44,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:44,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212697337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:44,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:44,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:44,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327269374] [2021-07-09 17:31:44,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:44,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:44,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:44,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:44,226 INFO L87 Difference]: Start difference. First operand 215 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:44,654 INFO L93 Difference]: Finished difference Result 258 states and 569 transitions. [2021-07-09 17:31:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:44,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:44,655 INFO L225 Difference]: With dead ends: 258 [2021-07-09 17:31:44,655 INFO L226 Difference]: Without dead ends: 258 [2021-07-09 17:31:44,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:31:44,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-09 17:31:44,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 214. [2021-07-09 17:31:44,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.267605633802817) internal successors, (483), 213 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 483 transitions. [2021-07-09 17:31:44,657 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 483 transitions. Word has length 19 [2021-07-09 17:31:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:44,657 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 483 transitions. [2021-07-09 17:31:44,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:44,657 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 483 transitions. [2021-07-09 17:31:44,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:44,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:44,657 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:44,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2612 [2021-07-09 17:31:44,858 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:44,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:44,858 INFO L82 PathProgramCache]: Analyzing trace with hash -159939444, now seen corresponding path program 340 times [2021-07-09 17:31:44,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:44,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158529449] [2021-07-09 17:31:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:44,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:44,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158529449] [2021-07-09 17:31:44,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158529449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:44,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437810911] [2021-07-09 17:31:44,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:44,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:44,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:44,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:44,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:45,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437810911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:45,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:45,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:45,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651046577] [2021-07-09 17:31:45,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:45,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:45,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:45,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:45,166 INFO L87 Difference]: Start difference. First operand 214 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:45,398 INFO L93 Difference]: Finished difference Result 246 states and 543 transitions. [2021-07-09 17:31:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:45,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:45,399 INFO L225 Difference]: With dead ends: 246 [2021-07-09 17:31:45,399 INFO L226 Difference]: Without dead ends: 246 [2021-07-09 17:31:45,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-09 17:31:45,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 210. [2021-07-09 17:31:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-07-09 17:31:45,401 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-07-09 17:31:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:45,401 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-07-09 17:31:45,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-07-09 17:31:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:45,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:45,401 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:45,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2617,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:45,602 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:45,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:45,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1533464087, now seen corresponding path program 341 times [2021-07-09 17:31:45,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:45,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708591544] [2021-07-09 17:31:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:45,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:45,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708591544] [2021-07-09 17:31:45,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708591544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:45,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902117894] [2021-07-09 17:31:45,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:45,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:45,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:45,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:45,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:45,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902117894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:45,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:45,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:45,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732824535] [2021-07-09 17:31:45,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:45,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:45,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:45,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:45,896 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:46,044 INFO L93 Difference]: Finished difference Result 232 states and 515 transitions. [2021-07-09 17:31:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:46,044 INFO L225 Difference]: With dead ends: 232 [2021-07-09 17:31:46,045 INFO L226 Difference]: Without dead ends: 232 [2021-07-09 17:31:46,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-09 17:31:46,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 210. [2021-07-09 17:31:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-07-09 17:31:46,047 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-07-09 17:31:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:46,047 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-07-09 17:31:46,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-07-09 17:31:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:46,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:46,047 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:46,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2622,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:46,261 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:46,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1690507745, now seen corresponding path program 342 times [2021-07-09 17:31:46,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:46,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888199409] [2021-07-09 17:31:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:46,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:46,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888199409] [2021-07-09 17:31:46,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888199409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:46,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388895132] [2021-07-09 17:31:46,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:46,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:46,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:46,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:31:46,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:46,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388895132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:46,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:46,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:46,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3809149] [2021-07-09 17:31:46,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:46,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:46,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:46,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:46,570 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:46,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:46,931 INFO L93 Difference]: Finished difference Result 247 states and 545 transitions. [2021-07-09 17:31:46,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:46,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:46,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:46,932 INFO L225 Difference]: With dead ends: 247 [2021-07-09 17:31:46,932 INFO L226 Difference]: Without dead ends: 247 [2021-07-09 17:31:46,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 430.4ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-09 17:31:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 210. [2021-07-09 17:31:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-07-09 17:31:46,937 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-07-09 17:31:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:46,937 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-07-09 17:31:46,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:46,937 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-07-09 17:31:46,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:46,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:46,937 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:47,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2627,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:47,138 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:47,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:47,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1807723799, now seen corresponding path program 343 times [2021-07-09 17:31:47,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:47,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821670082] [2021-07-09 17:31:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:47,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:47,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821670082] [2021-07-09 17:31:47,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821670082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:47,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584360713] [2021-07-09 17:31:47,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:47,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:47,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584360713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:47,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:47,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:47,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844146609] [2021-07-09 17:31:47,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:47,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:47,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:47,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:47,440 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:47,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:47,863 INFO L93 Difference]: Finished difference Result 262 states and 570 transitions. [2021-07-09 17:31:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:47,863 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:47,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:47,863 INFO L225 Difference]: With dead ends: 262 [2021-07-09 17:31:47,863 INFO L226 Difference]: Without dead ends: 259 [2021-07-09 17:31:47,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:47,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-07-09 17:31:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 210. [2021-07-09 17:31:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:47,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-07-09 17:31:47,866 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-07-09 17:31:47,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:47,866 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-07-09 17:31:47,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:47,866 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-07-09 17:31:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:47,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:47,866 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:48,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2632,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:48,067 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:48,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:48,067 INFO L82 PathProgramCache]: Analyzing trace with hash -680327706, now seen corresponding path program 344 times [2021-07-09 17:31:48,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:48,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997489073] [2021-07-09 17:31:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:48,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:48,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997489073] [2021-07-09 17:31:48,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997489073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:48,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994243026] [2021-07-09 17:31:48,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:48,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:48,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:48,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:48,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:48,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994243026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:48,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:48,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:48,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649630017] [2021-07-09 17:31:48,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:48,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:48,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:48,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:48,416 INFO L87 Difference]: Start difference. First operand 210 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:48,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:48,657 INFO L93 Difference]: Finished difference Result 238 states and 522 transitions. [2021-07-09 17:31:48,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:48,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:48,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:48,658 INFO L225 Difference]: With dead ends: 238 [2021-07-09 17:31:48,658 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:31:48,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:31:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 206. [2021-07-09 17:31:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-07-09 17:31:48,660 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-07-09 17:31:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:48,660 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-07-09 17:31:48,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-07-09 17:31:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:48,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:48,660 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:48,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2639 [2021-07-09 17:31:48,861 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash 207372807, now seen corresponding path program 345 times [2021-07-09 17:31:48,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:48,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932485567] [2021-07-09 17:31:48,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:48,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:48,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932485567] [2021-07-09 17:31:48,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932485567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:48,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264624093] [2021-07-09 17:31:48,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:49,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:49,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:49,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264624093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:49,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:49,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:49,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776728800] [2021-07-09 17:31:49,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:49,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:49,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:49,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:49,178 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:49,379 INFO L93 Difference]: Finished difference Result 235 states and 517 transitions. [2021-07-09 17:31:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:49,379 INFO L225 Difference]: With dead ends: 235 [2021-07-09 17:31:49,380 INFO L226 Difference]: Without dead ends: 235 [2021-07-09 17:31:49,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 290.7ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-09 17:31:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-07-09 17:31:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:49,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-07-09 17:31:49,382 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-07-09 17:31:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:49,382 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-07-09 17:31:49,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-07-09 17:31:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:49,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:49,382 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:49,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2647,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:49,583 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:49,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1004108559, now seen corresponding path program 346 times [2021-07-09 17:31:49,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:49,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293674439] [2021-07-09 17:31:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:49,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:49,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293674439] [2021-07-09 17:31:49,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293674439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:49,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439739385] [2021-07-09 17:31:49,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:49,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:49,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:49,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:49,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:49,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439739385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:49,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:49,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:49,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888879511] [2021-07-09 17:31:49,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:49,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:49,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:49,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:49,899 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:50,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:50,264 INFO L93 Difference]: Finished difference Result 258 states and 560 transitions. [2021-07-09 17:31:50,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:50,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:50,265 INFO L225 Difference]: With dead ends: 258 [2021-07-09 17:31:50,265 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:31:50,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 429.2ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:50,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:31:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 209. [2021-07-09 17:31:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2403846153846154) internal successors, (466), 208 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-07-09 17:31:50,267 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-07-09 17:31:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:50,267 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-07-09 17:31:50,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:50,267 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-07-09 17:31:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:50,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:50,267 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:50,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2652 [2021-07-09 17:31:50,468 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:50,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2131504652, now seen corresponding path program 347 times [2021-07-09 17:31:50,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:50,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356957031] [2021-07-09 17:31:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:50,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356957031] [2021-07-09 17:31:50,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356957031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893813599] [2021-07-09 17:31:50,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:50,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:31:50,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:50,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:50,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:50,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893813599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:50,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:50,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:50,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382246520] [2021-07-09 17:31:50,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:50,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:50,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:50,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:50,831 INFO L87 Difference]: Start difference. First operand 209 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:51,529 INFO L93 Difference]: Finished difference Result 343 states and 704 transitions. [2021-07-09 17:31:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:31:51,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:51,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:51,530 INFO L225 Difference]: With dead ends: 343 [2021-07-09 17:31:51,530 INFO L226 Difference]: Without dead ends: 341 [2021-07-09 17:31:51,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 790.6ms TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:31:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-07-09 17:31:51,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 213. [2021-07-09 17:31:51,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2641509433962264) internal successors, (480), 212 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-07-09 17:31:51,533 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-07-09 17:31:51,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:51,533 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-07-09 17:31:51,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:51,533 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-07-09 17:31:51,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:51,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:51,533 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:51,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2659,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:51,734 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:51,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:51,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1510454825, now seen corresponding path program 348 times [2021-07-09 17:31:51,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:51,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224449585] [2021-07-09 17:31:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:51,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:51,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224449585] [2021-07-09 17:31:51,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224449585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:51,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325723837] [2021-07-09 17:31:51,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:51,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:31:51,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:51,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:51,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:52,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325723837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:52,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:52,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:52,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102320290] [2021-07-09 17:31:52,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:52,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:52,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:52,119 INFO L87 Difference]: Start difference. First operand 213 states and 480 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:52,315 INFO L93 Difference]: Finished difference Result 234 states and 522 transitions. [2021-07-09 17:31:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:52,316 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:52,316 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:31:52,316 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:31:52,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 384.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:52,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:31:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 213. [2021-07-09 17:31:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2641509433962264) internal successors, (480), 212 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-07-09 17:31:52,318 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-07-09 17:31:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:52,318 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-07-09 17:31:52,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-07-09 17:31:52,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:52,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:52,319 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:52,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2667,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:52,519 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:52,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1798005060, now seen corresponding path program 349 times [2021-07-09 17:31:52,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:52,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023678571] [2021-07-09 17:31:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:52,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:52,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023678571] [2021-07-09 17:31:52,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023678571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:52,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58738372] [2021-07-09 17:31:52,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:52,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:31:52,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:52,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58738372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:52,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:52,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:52,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320432299] [2021-07-09 17:31:52,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:52,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:52,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:52,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:52,908 INFO L87 Difference]: Start difference. First operand 213 states and 480 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:53,273 INFO L93 Difference]: Finished difference Result 277 states and 597 transitions. [2021-07-09 17:31:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:31:53,273 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:53,274 INFO L225 Difference]: With dead ends: 277 [2021-07-09 17:31:53,274 INFO L226 Difference]: Without dead ends: 277 [2021-07-09 17:31:53,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 535.6ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:31:53,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-09 17:31:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 210. [2021-07-09 17:31:53,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-07-09 17:31:53,276 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-07-09 17:31:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:53,276 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-07-09 17:31:53,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-07-09 17:31:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:53,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:53,277 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:53,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2675 [2021-07-09 17:31:53,477 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:53,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:53,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2099995340, now seen corresponding path program 350 times [2021-07-09 17:31:53,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:53,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816292595] [2021-07-09 17:31:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:53,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:53,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816292595] [2021-07-09 17:31:53,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816292595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:53,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595079342] [2021-07-09 17:31:53,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:53,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:53,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:53,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:53,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:53,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595079342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:53,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:53,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:53,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587416622] [2021-07-09 17:31:53,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:53,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:53,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:53,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:53,788 INFO L87 Difference]: Start difference. First operand 210 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:53,960 INFO L93 Difference]: Finished difference Result 248 states and 543 transitions. [2021-07-09 17:31:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:31:53,961 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:53,961 INFO L225 Difference]: With dead ends: 248 [2021-07-09 17:31:53,961 INFO L226 Difference]: Without dead ends: 248 [2021-07-09 17:31:53,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:31:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-09 17:31:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 205. [2021-07-09 17:31:53,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2401960784313726) internal successors, (457), 204 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:53,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 457 transitions. [2021-07-09 17:31:53,963 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 457 transitions. Word has length 19 [2021-07-09 17:31:53,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:53,963 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 457 transitions. [2021-07-09 17:31:53,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:53,964 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 457 transitions. [2021-07-09 17:31:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:53,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:53,964 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:54,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2681,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:54,164 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1474829985, now seen corresponding path program 351 times [2021-07-09 17:31:54,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:54,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815550057] [2021-07-09 17:31:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:54,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:54,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815550057] [2021-07-09 17:31:54,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815550057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:54,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513267857] [2021-07-09 17:31:54,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:54,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:54,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:54,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:31:54,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:54,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513267857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:54,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:54,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:31:54,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934621531] [2021-07-09 17:31:54,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:31:54,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:54,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:31:54,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:54,486 INFO L87 Difference]: Start difference. First operand 205 states and 457 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:54,665 INFO L93 Difference]: Finished difference Result 235 states and 517 transitions. [2021-07-09 17:31:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:54,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:54,666 INFO L225 Difference]: With dead ends: 235 [2021-07-09 17:31:54,666 INFO L226 Difference]: Without dead ends: 235 [2021-07-09 17:31:54,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-09 17:31:54,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-07-09 17:31:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-07-09 17:31:54,668 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-07-09 17:31:54,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:54,668 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-07-09 17:31:54,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,668 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-07-09 17:31:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:54,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:54,669 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:54,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2686,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:54,869 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:54,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:54,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2023401559, now seen corresponding path program 352 times [2021-07-09 17:31:54,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:54,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238501320] [2021-07-09 17:31:54,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:54,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:54,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238501320] [2021-07-09 17:31:54,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238501320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:54,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106541112] [2021-07-09 17:31:54,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:55,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:55,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:55,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:55,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:55,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106541112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:55,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:55,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:55,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647938825] [2021-07-09 17:31:55,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:55,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:55,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:55,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:55,183 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:55,335 INFO L93 Difference]: Finished difference Result 255 states and 554 transitions. [2021-07-09 17:31:55,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:55,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:55,336 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:31:55,336 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:31:55,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:31:55,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 209. [2021-07-09 17:31:55,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2403846153846154) internal successors, (466), 208 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:55,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-07-09 17:31:55,338 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-07-09 17:31:55,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:55,338 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-07-09 17:31:55,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:55,338 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-07-09 17:31:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:55,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:55,339 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:55,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2691,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:55,539 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:55,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:55,539 INFO L82 PathProgramCache]: Analyzing trace with hash -896005466, now seen corresponding path program 353 times [2021-07-09 17:31:55,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:55,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584950178] [2021-07-09 17:31:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:55,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:55,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584950178] [2021-07-09 17:31:55,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584950178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:55,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75367955] [2021-07-09 17:31:55,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:55,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:31:55,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:55,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:55,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:55,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75367955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:55,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:55,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:55,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431501031] [2021-07-09 17:31:55,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:55,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:55,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:55,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:55,899 INFO L87 Difference]: Start difference. First operand 209 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:56,044 INFO L93 Difference]: Finished difference Result 231 states and 507 transitions. [2021-07-09 17:31:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:31:56,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:56,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:56,045 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:31:56,045 INFO L226 Difference]: Without dead ends: 229 [2021-07-09 17:31:56,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:31:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-07-09 17:31:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 207. [2021-07-09 17:31:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.237864077669903) internal successors, (461), 206 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-07-09 17:31:56,047 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-07-09 17:31:56,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:56,047 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-07-09 17:31:56,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-07-09 17:31:56,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:56,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:56,047 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:56,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2698,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:56,248 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:56,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1517055293, now seen corresponding path program 354 times [2021-07-09 17:31:56,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:56,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656603764] [2021-07-09 17:31:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:56,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:56,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656603764] [2021-07-09 17:31:56,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656603764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:56,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754871310] [2021-07-09 17:31:56,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:56,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:31:56,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:56,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:56,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:56,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754871310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:56,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:56,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:56,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051492076] [2021-07-09 17:31:56,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:56,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:56,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:56,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:56,617 INFO L87 Difference]: Start difference. First operand 207 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:56,908 INFO L93 Difference]: Finished difference Result 225 states and 497 transitions. [2021-07-09 17:31:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:31:56,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:56,909 INFO L225 Difference]: With dead ends: 225 [2021-07-09 17:31:56,909 INFO L226 Difference]: Without dead ends: 225 [2021-07-09 17:31:56,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:31:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-09 17:31:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 209. [2021-07-09 17:31:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.235576923076923) internal successors, (465), 208 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-07-09 17:31:56,911 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-07-09 17:31:56,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:56,911 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-07-09 17:31:56,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-07-09 17:31:56,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:56,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:56,911 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:57,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2706,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:57,112 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:57,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1229505058, now seen corresponding path program 355 times [2021-07-09 17:31:57,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:57,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898294480] [2021-07-09 17:31:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:57,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:57,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898294480] [2021-07-09 17:31:57,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898294480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:57,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414281700] [2021-07-09 17:31:57,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:57,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:57,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:57,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414281700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:57,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:57,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:57,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970075002] [2021-07-09 17:31:57,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:57,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:57,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:57,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:57,426 INFO L87 Difference]: Start difference. First operand 209 states and 465 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:57,776 INFO L93 Difference]: Finished difference Result 267 states and 577 transitions. [2021-07-09 17:31:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:31:57,777 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:57,777 INFO L225 Difference]: With dead ends: 267 [2021-07-09 17:31:57,777 INFO L226 Difference]: Without dead ends: 267 [2021-07-09 17:31:57,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:31:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-07-09 17:31:57,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 210. [2021-07-09 17:31:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-07-09 17:31:57,779 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-07-09 17:31:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:57,779 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-07-09 17:31:57,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-07-09 17:31:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:57,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:57,780 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:57,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:57,980 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:57,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:57,980 INFO L82 PathProgramCache]: Analyzing trace with hash -927514778, now seen corresponding path program 356 times [2021-07-09 17:31:57,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:57,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725505515] [2021-07-09 17:31:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:58,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:58,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725505515] [2021-07-09 17:31:58,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725505515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:58,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392109097] [2021-07-09 17:31:58,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:58,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:58,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:58,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:58,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:58,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392109097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:58,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:58,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:58,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291743938] [2021-07-09 17:31:58,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:58,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:58,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:58,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:58,288 INFO L87 Difference]: Start difference. First operand 210 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:58,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:58,504 INFO L93 Difference]: Finished difference Result 241 states and 529 transitions. [2021-07-09 17:31:58,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:31:58,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:58,505 INFO L225 Difference]: With dead ends: 241 [2021-07-09 17:31:58,505 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 17:31:58,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 317.2ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:31:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 17:31:58,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2021-07-09 17:31:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-07-09 17:31:58,507 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-07-09 17:31:58,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:58,507 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-07-09 17:31:58,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-07-09 17:31:58,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:58,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:58,507 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:58,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2721 [2021-07-09 17:31:58,708 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:58,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:58,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1294777065, now seen corresponding path program 357 times [2021-07-09 17:31:58,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:58,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000360899] [2021-07-09 17:31:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:58,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:58,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000360899] [2021-07-09 17:31:58,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000360899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:58,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584512899] [2021-07-09 17:31:58,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:58,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:31:58,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:58,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:31:58,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:59,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584512899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:59,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:59,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:59,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094862339] [2021-07-09 17:31:59,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:59,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:59,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:59,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:59,078 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:59,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:59,387 INFO L93 Difference]: Finished difference Result 237 states and 521 transitions. [2021-07-09 17:31:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:31:59,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:31:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:59,387 INFO L225 Difference]: With dead ends: 237 [2021-07-09 17:31:59,387 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 17:31:59,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:31:59,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 17:31:59,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 209. [2021-07-09 17:31:59,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.235576923076923) internal successors, (465), 208 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-07-09 17:31:59,389 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-07-09 17:31:59,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:59,389 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-07-09 17:31:59,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-07-09 17:31:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:31:59,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:59,390 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:59,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2726,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:59,590 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:59,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1582327300, now seen corresponding path program 358 times [2021-07-09 17:31:59,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:59,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769156804] [2021-07-09 17:31:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:59,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:59,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769156804] [2021-07-09 17:31:59,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769156804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:59,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831785969] [2021-07-09 17:31:59,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:59,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:59,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:59,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:31:59,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:59,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831785969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:59,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:59,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:31:59,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425721985] [2021-07-09 17:31:59,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:31:59,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:59,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:31:59,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:31:59,917 INFO L87 Difference]: Start difference. First operand 209 states and 465 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:00,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:00,381 INFO L93 Difference]: Finished difference Result 278 states and 599 transitions. [2021-07-09 17:32:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:00,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:00,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:00,381 INFO L225 Difference]: With dead ends: 278 [2021-07-09 17:32:00,381 INFO L226 Difference]: Without dead ends: 278 [2021-07-09 17:32:00,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 566.2ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-09 17:32:00,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 211. [2021-07-09 17:32:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-07-09 17:32:00,384 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-07-09 17:32:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:00,384 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-07-09 17:32:00,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-07-09 17:32:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:00,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:00,384 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:00,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2734 [2021-07-09 17:32:00,585 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:00,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:00,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1884317580, now seen corresponding path program 359 times [2021-07-09 17:32:00,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:00,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773400332] [2021-07-09 17:32:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:00,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:00,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773400332] [2021-07-09 17:32:00,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773400332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:00,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879873349] [2021-07-09 17:32:00,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:00,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:00,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:00,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:00,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:00,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879873349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:00,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:00,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:00,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141448745] [2021-07-09 17:32:00,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:00,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:00,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:00,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:00,904 INFO L87 Difference]: Start difference. First operand 211 states and 473 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:01,269 INFO L93 Difference]: Finished difference Result 254 states and 557 transitions. [2021-07-09 17:32:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:01,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:01,269 INFO L225 Difference]: With dead ends: 254 [2021-07-09 17:32:01,269 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:32:01,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 473.3ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:32:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 210. [2021-07-09 17:32:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-07-09 17:32:01,272 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-07-09 17:32:01,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:01,272 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-07-09 17:32:01,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-07-09 17:32:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:01,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:01,272 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:01,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2740,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:01,473 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:01,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1904303450, now seen corresponding path program 360 times [2021-07-09 17:32:01,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:01,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797029554] [2021-07-09 17:32:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:01,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:01,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797029554] [2021-07-09 17:32:01,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797029554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:01,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671953056] [2021-07-09 17:32:01,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:01,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:01,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:01,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:01,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:01,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671953056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:01,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:01,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:01,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149635620] [2021-07-09 17:32:01,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:01,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:01,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:01,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:01,768 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:01,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:01,950 INFO L93 Difference]: Finished difference Result 242 states and 531 transitions. [2021-07-09 17:32:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:01,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:01,951 INFO L225 Difference]: With dead ends: 242 [2021-07-09 17:32:01,951 INFO L226 Difference]: Without dead ends: 242 [2021-07-09 17:32:01,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:01,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-09 17:32:01,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2021-07-09 17:32:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-07-09 17:32:01,953 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-07-09 17:32:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:01,953 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-07-09 17:32:01,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-07-09 17:32:01,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:01,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:01,954 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:02,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2745 [2021-07-09 17:32:02,154 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:02,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:02,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2111296839, now seen corresponding path program 361 times [2021-07-09 17:32:02,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:02,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384257893] [2021-07-09 17:32:02,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:02,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:02,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384257893] [2021-07-09 17:32:02,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384257893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:02,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078348423] [2021-07-09 17:32:02,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:02,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:02,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:02,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078348423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:02,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:02,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:02,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533051576] [2021-07-09 17:32:02,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:02,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:02,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:02,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:02,472 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:02,596 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2021-07-09 17:32:02,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:02,597 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:02,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:02,597 INFO L225 Difference]: With dead ends: 236 [2021-07-09 17:32:02,597 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:32:02,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:32:02,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 209. [2021-07-09 17:32:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.235576923076923) internal successors, (465), 208 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-07-09 17:32:02,599 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-07-09 17:32:02,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:02,599 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-07-09 17:32:02,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:02,600 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-07-09 17:32:02,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:02,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:02,600 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:02,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2750 [2021-07-09 17:32:02,800 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:02,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1386934705, now seen corresponding path program 362 times [2021-07-09 17:32:02,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:02,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614265939] [2021-07-09 17:32:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:02,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:02,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614265939] [2021-07-09 17:32:02,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614265939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:02,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31187367] [2021-07-09 17:32:02,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:02,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:02,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:02,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:02,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:03,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31187367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:03,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:03,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:03,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329496567] [2021-07-09 17:32:03,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:03,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:03,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:03,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:03,116 INFO L87 Difference]: Start difference. First operand 209 states and 465 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:03,275 INFO L93 Difference]: Finished difference Result 256 states and 556 transitions. [2021-07-09 17:32:03,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:03,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:03,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:03,276 INFO L225 Difference]: With dead ends: 256 [2021-07-09 17:32:03,276 INFO L226 Difference]: Without dead ends: 253 [2021-07-09 17:32:03,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:03,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-07-09 17:32:03,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2021-07-09 17:32:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2392344497607657) internal successors, (468), 209 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 468 transitions. [2021-07-09 17:32:03,278 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 468 transitions. Word has length 19 [2021-07-09 17:32:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:03,278 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 468 transitions. [2021-07-09 17:32:03,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 468 transitions. [2021-07-09 17:32:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:03,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:03,278 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:03,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2755,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:03,479 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:03,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:03,479 INFO L82 PathProgramCache]: Analyzing trace with hash -259538612, now seen corresponding path program 363 times [2021-07-09 17:32:03,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:03,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506022047] [2021-07-09 17:32:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:03,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:03,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506022047] [2021-07-09 17:32:03,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506022047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:03,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971340272] [2021-07-09 17:32:03,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:03,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:03,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:03,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:03,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:03,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971340272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:03,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:03,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:03,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323711121] [2021-07-09 17:32:03,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:03,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:03,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:03,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:03,831 INFO L87 Difference]: Start difference. First operand 210 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:03,996 INFO L93 Difference]: Finished difference Result 232 states and 509 transitions. [2021-07-09 17:32:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:03,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:03,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:03,996 INFO L225 Difference]: With dead ends: 232 [2021-07-09 17:32:03,996 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:32:03,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:03,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:32:03,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 208. [2021-07-09 17:32:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-07-09 17:32:03,998 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-07-09 17:32:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:03,998 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-07-09 17:32:03,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-07-09 17:32:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:03,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:03,999 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:04,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2762 [2021-07-09 17:32:04,199 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:04,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:04,200 INFO L82 PathProgramCache]: Analyzing trace with hash -880588439, now seen corresponding path program 364 times [2021-07-09 17:32:04,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:04,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931261799] [2021-07-09 17:32:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:04,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:04,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931261799] [2021-07-09 17:32:04,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931261799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:04,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278969336] [2021-07-09 17:32:04,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:04,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:04,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:04,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:04,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:04,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278969336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:04,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:04,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:04,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889939103] [2021-07-09 17:32:04,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:04,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:04,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:04,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:04,574 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:04,765 INFO L93 Difference]: Finished difference Result 227 states and 501 transitions. [2021-07-09 17:32:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:04,765 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:04,766 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:32:04,766 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:32:04,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:04,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:32:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 210. [2021-07-09 17:32:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2344497607655502) internal successors, (467), 209 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-07-09 17:32:04,768 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-07-09 17:32:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:04,768 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-07-09 17:32:04,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-07-09 17:32:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:04,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:04,768 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:04,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2770,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:04,984 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:04,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:04,984 INFO L82 PathProgramCache]: Analyzing trace with hash -593038204, now seen corresponding path program 365 times [2021-07-09 17:32:04,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:04,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224965066] [2021-07-09 17:32:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:05,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:05,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224965066] [2021-07-09 17:32:05,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224965066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:05,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978213979] [2021-07-09 17:32:05,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:05,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:05,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:05,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:05,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:05,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978213979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:05,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:05,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:05,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660093969] [2021-07-09 17:32:05,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:05,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:05,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:05,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:05,290 INFO L87 Difference]: Start difference. First operand 210 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:05,650 INFO L93 Difference]: Finished difference Result 261 states and 565 transitions. [2021-07-09 17:32:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:05,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:05,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:05,651 INFO L225 Difference]: With dead ends: 261 [2021-07-09 17:32:05,651 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:32:05,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:32:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 211. [2021-07-09 17:32:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2476190476190476) internal successors, (472), 210 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 472 transitions. [2021-07-09 17:32:05,653 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 472 transitions. Word has length 19 [2021-07-09 17:32:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:05,653 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 472 transitions. [2021-07-09 17:32:05,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,653 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 472 transitions. [2021-07-09 17:32:05,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:05,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:05,654 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:05,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2778 [2021-07-09 17:32:05,854 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash -291047924, now seen corresponding path program 366 times [2021-07-09 17:32:05,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:05,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163356239] [2021-07-09 17:32:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:05,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:05,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163356239] [2021-07-09 17:32:05,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163356239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:05,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501792934] [2021-07-09 17:32:05,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:06,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:06,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:06,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:06,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:06,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501792934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:06,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:06,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:06,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47115903] [2021-07-09 17:32:06,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:06,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:06,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:06,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:06,165 INFO L87 Difference]: Start difference. First operand 211 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:06,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:06,402 INFO L93 Difference]: Finished difference Result 241 states and 529 transitions. [2021-07-09 17:32:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:06,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:06,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:06,403 INFO L225 Difference]: With dead ends: 241 [2021-07-09 17:32:06,403 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 17:32:06,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 17:32:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 207. [2021-07-09 17:32:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.237864077669903) internal successors, (461), 206 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-07-09 17:32:06,405 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-07-09 17:32:06,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:06,405 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-07-09 17:32:06,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:06,405 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-07-09 17:32:06,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:06,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:06,405 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:06,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2785,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:06,606 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:06,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:06,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1931243919, now seen corresponding path program 367 times [2021-07-09 17:32:06,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:06,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663551921] [2021-07-09 17:32:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:06,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:06,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663551921] [2021-07-09 17:32:06,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663551921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:06,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127612070] [2021-07-09 17:32:06,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:06,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:06,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:06,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127612070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:06,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:06,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:06,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80940187] [2021-07-09 17:32:06,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:06,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:06,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:06,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:06,967 INFO L87 Difference]: Start difference. First operand 207 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:07,192 INFO L93 Difference]: Finished difference Result 227 states and 501 transitions. [2021-07-09 17:32:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:32:07,193 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:07,193 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:32:07,193 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:32:07,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:32:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 210. [2021-07-09 17:32:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2344497607655502) internal successors, (467), 209 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-07-09 17:32:07,195 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-07-09 17:32:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:07,195 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-07-09 17:32:07,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-07-09 17:32:07,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:07,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:07,196 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:07,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2790,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:07,396 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:07,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2076173142, now seen corresponding path program 368 times [2021-07-09 17:32:07,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:07,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017164517] [2021-07-09 17:32:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:07,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:07,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017164517] [2021-07-09 17:32:07,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017164517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:07,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223819080] [2021-07-09 17:32:07,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:07,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:07,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:07,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:07,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:07,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223819080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:07,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:07,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:07,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868338018] [2021-07-09 17:32:07,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:07,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:07,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:07,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:07,716 INFO L87 Difference]: Start difference. First operand 210 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:08,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:08,229 INFO L93 Difference]: Finished difference Result 280 states and 603 transitions. [2021-07-09 17:32:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:08,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:08,230 INFO L225 Difference]: With dead ends: 280 [2021-07-09 17:32:08,230 INFO L226 Difference]: Without dead ends: 280 [2021-07-09 17:32:08,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 555.7ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-09 17:32:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 212. [2021-07-09 17:32:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.251184834123223) internal successors, (475), 211 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 475 transitions. [2021-07-09 17:32:08,232 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 475 transitions. Word has length 19 [2021-07-09 17:32:08,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:08,232 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 475 transitions. [2021-07-09 17:32:08,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:08,232 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 475 transitions. [2021-07-09 17:32:08,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:08,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:08,233 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:08,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2798,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:08,449 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:08,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:08,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1774182862, now seen corresponding path program 369 times [2021-07-09 17:32:08,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:08,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29805670] [2021-07-09 17:32:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:08,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:08,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29805670] [2021-07-09 17:32:08,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29805670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:08,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493378668] [2021-07-09 17:32:08,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:08,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:08,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:08,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493378668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:08,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:08,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:08,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851424886] [2021-07-09 17:32:08,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:08,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:08,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:08,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:08,746 INFO L87 Difference]: Start difference. First operand 212 states and 475 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:09,159 INFO L93 Difference]: Finished difference Result 252 states and 553 transitions. [2021-07-09 17:32:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:09,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:09,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:09,160 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:32:09,160 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:32:09,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 512.4ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:09,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:32:09,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 211. [2021-07-09 17:32:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-07-09 17:32:09,162 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-07-09 17:32:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:09,162 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-07-09 17:32:09,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,162 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-07-09 17:32:09,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:09,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:09,163 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:09,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2805,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:09,363 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:09,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1267836596, now seen corresponding path program 370 times [2021-07-09 17:32:09,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:09,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738745586] [2021-07-09 17:32:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:09,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:09,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738745586] [2021-07-09 17:32:09,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738745586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:09,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076781691] [2021-07-09 17:32:09,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:09,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:09,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:09,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:09,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076781691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:09,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:09,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:09,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386060897] [2021-07-09 17:32:09,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:09,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:09,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:09,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:09,658 INFO L87 Difference]: Start difference. First operand 211 states and 473 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:09,885 INFO L93 Difference]: Finished difference Result 243 states and 533 transitions. [2021-07-09 17:32:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:09,885 INFO L225 Difference]: With dead ends: 243 [2021-07-09 17:32:09,885 INFO L226 Difference]: Without dead ends: 243 [2021-07-09 17:32:09,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 271.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:09,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-09 17:32:09,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 206. [2021-07-09 17:32:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-07-09 17:32:09,888 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-07-09 17:32:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:09,888 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-07-09 17:32:09,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-07-09 17:32:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:09,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:09,888 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:10,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-07-09 17:32:10,100 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:10,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:10,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1096266199, now seen corresponding path program 371 times [2021-07-09 17:32:10,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:10,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394251968] [2021-07-09 17:32:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:10,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:10,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394251968] [2021-07-09 17:32:10,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394251968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:10,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457593522] [2021-07-09 17:32:10,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:10,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:10,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:10,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:10,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457593522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:10,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:10,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:32:10,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319886355] [2021-07-09 17:32:10,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:10,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:10,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:10,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:10,485 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:10,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:10,859 INFO L93 Difference]: Finished difference Result 228 states and 503 transitions. [2021-07-09 17:32:10,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:10,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:10,859 INFO L225 Difference]: With dead ends: 228 [2021-07-09 17:32:10,859 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:32:10,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:32:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 210. [2021-07-09 17:32:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2344497607655502) internal successors, (467), 209 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-07-09 17:32:10,861 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-07-09 17:32:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:10,862 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-07-09 17:32:10,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-07-09 17:32:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:10,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:10,862 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:11,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2815,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:11,063 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:11,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:11,063 INFO L82 PathProgramCache]: Analyzing trace with hash -808715964, now seen corresponding path program 372 times [2021-07-09 17:32:11,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:11,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874832553] [2021-07-09 17:32:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:11,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:11,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874832553] [2021-07-09 17:32:11,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874832553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:11,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964431498] [2021-07-09 17:32:11,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:11,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:11,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:11,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:11,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:11,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964431498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:11,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:11,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:32:11,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717720419] [2021-07-09 17:32:11,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:11,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:11,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:11,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:11,379 INFO L87 Difference]: Start difference. First operand 210 states and 467 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:12,075 INFO L93 Difference]: Finished difference Result 276 states and 595 transitions. [2021-07-09 17:32:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:32:12,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:12,075 INFO L225 Difference]: With dead ends: 276 [2021-07-09 17:32:12,075 INFO L226 Difference]: Without dead ends: 276 [2021-07-09 17:32:12,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 731.3ms TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:32:12,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-07-09 17:32:12,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 213. [2021-07-09 17:32:12,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2547169811320753) internal successors, (478), 212 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 478 transitions. [2021-07-09 17:32:12,078 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 478 transitions. Word has length 19 [2021-07-09 17:32:12,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:12,078 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 478 transitions. [2021-07-09 17:32:12,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:12,078 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 478 transitions. [2021-07-09 17:32:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:12,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:12,078 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:12,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2823 [2021-07-09 17:32:12,279 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:12,279 INFO L82 PathProgramCache]: Analyzing trace with hash -506725684, now seen corresponding path program 373 times [2021-07-09 17:32:12,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:12,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393833799] [2021-07-09 17:32:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:12,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:12,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393833799] [2021-07-09 17:32:12,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393833799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:12,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609105105] [2021-07-09 17:32:12,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:12,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:12,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:12,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609105105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:12,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:12,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:32:12,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918495025] [2021-07-09 17:32:12,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:12,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:12,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:12,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:12,597 INFO L87 Difference]: Start difference. First operand 213 states and 478 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:13,188 INFO L93 Difference]: Finished difference Result 265 states and 579 transitions. [2021-07-09 17:32:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:32:13,188 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:13,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:13,188 INFO L225 Difference]: With dead ends: 265 [2021-07-09 17:32:13,189 INFO L226 Difference]: Without dead ends: 265 [2021-07-09 17:32:13,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 657.0ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:32:13,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-09 17:32:13,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2021-07-09 17:32:13,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.255924170616114) internal successors, (476), 211 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:13,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 476 transitions. [2021-07-09 17:32:13,191 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 476 transitions. Word has length 19 [2021-07-09 17:32:13,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:13,191 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 476 transitions. [2021-07-09 17:32:13,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 476 transitions. [2021-07-09 17:32:13,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:13,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:13,191 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:13,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2830 [2021-07-09 17:32:13,407 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:13,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:13,408 INFO L82 PathProgramCache]: Analyzing trace with hash -379418, now seen corresponding path program 374 times [2021-07-09 17:32:13,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:13,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539896457] [2021-07-09 17:32:13,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:13,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:13,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539896457] [2021-07-09 17:32:13,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539896457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:13,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714734076] [2021-07-09 17:32:13,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:13,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:13,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:13,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:13,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:13,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714734076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:13,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:13,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:32:13,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684024366] [2021-07-09 17:32:13,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:13,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:13,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:13,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:13,709 INFO L87 Difference]: Start difference. First operand 212 states and 476 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:14,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:14,227 INFO L93 Difference]: Finished difference Result 259 states and 568 transitions. [2021-07-09 17:32:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:14,227 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:14,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:14,228 INFO L225 Difference]: With dead ends: 259 [2021-07-09 17:32:14,228 INFO L226 Difference]: Without dead ends: 259 [2021-07-09 17:32:14,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 598.0ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:32:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-07-09 17:32:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 211. [2021-07-09 17:32:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.257142857142857) internal successors, (474), 210 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 474 transitions. [2021-07-09 17:32:14,230 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 474 transitions. Word has length 19 [2021-07-09 17:32:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:14,230 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 474 transitions. [2021-07-09 17:32:14,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:14,230 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 474 transitions. [2021-07-09 17:32:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:14,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:14,231 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:14,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2835,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:14,431 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:14,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1483514356, now seen corresponding path program 375 times [2021-07-09 17:32:14,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:14,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162560910] [2021-07-09 17:32:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:14,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:14,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162560910] [2021-07-09 17:32:14,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162560910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:14,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963852710] [2021-07-09 17:32:14,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:14,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:14,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:14,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:32:14,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:14,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963852710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:14,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:14,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:32:14,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283286016] [2021-07-09 17:32:14,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:14,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:14,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:14,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:14,728 INFO L87 Difference]: Start difference. First operand 211 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:15,045 INFO L93 Difference]: Finished difference Result 239 states and 525 transitions. [2021-07-09 17:32:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:32:15,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:15,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:15,046 INFO L225 Difference]: With dead ends: 239 [2021-07-09 17:32:15,046 INFO L226 Difference]: Without dead ends: 239 [2021-07-09 17:32:15,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:15,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-07-09 17:32:15,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 208. [2021-07-09 17:32:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.241545893719807) internal successors, (464), 207 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-07-09 17:32:15,048 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-07-09 17:32:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:15,048 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-07-09 17:32:15,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,048 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-07-09 17:32:15,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:15,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:15,048 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:15,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2840 [2021-07-09 17:32:15,257 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:15,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1717344001, now seen corresponding path program 376 times [2021-07-09 17:32:15,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:15,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643438403] [2021-07-09 17:32:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:15,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:15,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643438403] [2021-07-09 17:32:15,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643438403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:15,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144633832] [2021-07-09 17:32:15,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:15,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:15,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:15,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:15,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:15,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144633832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:15,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:15,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:32:15,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248667782] [2021-07-09 17:32:15,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:15,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:15,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:15,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:15,526 INFO L87 Difference]: Start difference. First operand 208 states and 464 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:15,736 INFO L93 Difference]: Finished difference Result 220 states and 488 transitions. [2021-07-09 17:32:15,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:32:15,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:15,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:15,737 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:32:15,737 INFO L226 Difference]: Without dead ends: 220 [2021-07-09 17:32:15,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 291.7ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:15,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-09 17:32:15,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2021-07-09 17:32:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.241545893719807) internal successors, (464), 207 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-07-09 17:32:15,739 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-07-09 17:32:15,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:15,739 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-07-09 17:32:15,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-07-09 17:32:15,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:15,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:15,740 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:15,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2845,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:15,945 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:15,945 INFO L82 PathProgramCache]: Analyzing trace with hash -558465017, now seen corresponding path program 377 times [2021-07-09 17:32:15,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:15,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600970039] [2021-07-09 17:32:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:16,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:16,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600970039] [2021-07-09 17:32:16,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600970039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:16,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262427898] [2021-07-09 17:32:16,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:16,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:32:16,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:16,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:16,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:16,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262427898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:16,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:16,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:32:16,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508780272] [2021-07-09 17:32:16,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:16,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:16,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:16,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:16,211 INFO L87 Difference]: Start difference. First operand 208 states and 464 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:16,655 INFO L93 Difference]: Finished difference Result 236 states and 520 transitions. [2021-07-09 17:32:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:16,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:16,656 INFO L225 Difference]: With dead ends: 236 [2021-07-09 17:32:16,656 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:32:16,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:32:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:32:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-07-09 17:32:16,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.241545893719807) internal successors, (464), 207 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:16,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-07-09 17:32:16,659 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-07-09 17:32:16,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:16,659 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-07-09 17:32:16,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:16,659 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-07-09 17:32:16,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:16,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:16,659 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:16,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2850 [2021-07-09 17:32:16,861 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:16,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:16,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1629460481, now seen corresponding path program 378 times [2021-07-09 17:32:16,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:16,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476330022] [2021-07-09 17:32:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:16,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:16,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476330022] [2021-07-09 17:32:16,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476330022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:16,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362660644] [2021-07-09 17:32:16,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:16,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:16,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:17,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362660644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:17,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:17,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:32:17,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330232842] [2021-07-09 17:32:17,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:17,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:17,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:17,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:17,140 INFO L87 Difference]: Start difference. First operand 208 states and 464 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:17,630 INFO L93 Difference]: Finished difference Result 244 states and 534 transitions. [2021-07-09 17:32:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:32:17,630 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:17,631 INFO L225 Difference]: With dead ends: 244 [2021-07-09 17:32:17,631 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 17:32:17,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 17:32:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 209. [2021-07-09 17:32:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2403846153846154) internal successors, (466), 208 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-07-09 17:32:17,633 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-07-09 17:32:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:17,633 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-07-09 17:32:17,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-07-09 17:32:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:17,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:17,634 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:17,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2855,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:17,834 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:17,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:17,834 INFO L82 PathProgramCache]: Analyzing trace with hash -832724729, now seen corresponding path program 379 times [2021-07-09 17:32:17,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:17,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989780068] [2021-07-09 17:32:17,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:17,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:17,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989780068] [2021-07-09 17:32:17,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989780068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:17,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481327552] [2021-07-09 17:32:17,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:17,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:17,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:18,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481327552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:18,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:18,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:32:18,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320148643] [2021-07-09 17:32:18,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:18,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:18,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:18,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:18,105 INFO L87 Difference]: Start difference. First operand 209 states and 466 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:18,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:18,914 INFO L93 Difference]: Finished difference Result 277 states and 586 transitions. [2021-07-09 17:32:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:32:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:18,915 INFO L225 Difference]: With dead ends: 277 [2021-07-09 17:32:18,915 INFO L226 Difference]: Without dead ends: 277 [2021-07-09 17:32:18,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 825.0ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:32:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-09 17:32:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 210. [2021-07-09 17:32:18,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-07-09 17:32:18,917 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-07-09 17:32:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:18,917 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-07-09 17:32:18,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-07-09 17:32:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:18,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:18,918 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:19,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2860 [2021-07-09 17:32:19,118 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:19,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:19,118 INFO L82 PathProgramCache]: Analyzing trace with hash 294671364, now seen corresponding path program 380 times [2021-07-09 17:32:19,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:19,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952240895] [2021-07-09 17:32:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:19,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:19,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952240895] [2021-07-09 17:32:19,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952240895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:19,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907890547] [2021-07-09 17:32:19,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:19,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:19,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:19,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:19,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:19,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907890547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:19,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:19,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:32:19,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300310331] [2021-07-09 17:32:19,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:19,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:19,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:19,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:19,455 INFO L87 Difference]: Start difference. First operand 210 states and 470 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:19,767 INFO L93 Difference]: Finished difference Result 227 states and 500 transitions. [2021-07-09 17:32:19,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:19,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:19,768 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:32:19,768 INFO L226 Difference]: Without dead ends: 225 [2021-07-09 17:32:19,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 412.5ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-09 17:32:19,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 206. [2021-07-09 17:32:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2439024390243905) internal successors, (460), 205 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 460 transitions. [2021-07-09 17:32:19,770 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 460 transitions. Word has length 19 [2021-07-09 17:32:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:19,770 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 460 transitions. [2021-07-09 17:32:19,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:19,770 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 460 transitions. [2021-07-09 17:32:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:19,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:19,771 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:19,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-07-09 17:32:19,987 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:19,987 INFO L82 PathProgramCache]: Analyzing trace with hash 708992161, now seen corresponding path program 381 times [2021-07-09 17:32:19,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:19,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821410154] [2021-07-09 17:32:19,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:20,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:20,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821410154] [2021-07-09 17:32:20,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821410154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:20,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236866378] [2021-07-09 17:32:20,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:20,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:32:20,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:20,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:20,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236866378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:20,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:20,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:20,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872912228] [2021-07-09 17:32:20,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:20,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:20,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:20,260 INFO L87 Difference]: Start difference. First operand 206 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:20,436 INFO L93 Difference]: Finished difference Result 229 states and 505 transitions. [2021-07-09 17:32:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:20,436 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:20,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:20,436 INFO L225 Difference]: With dead ends: 229 [2021-07-09 17:32:20,436 INFO L226 Difference]: Without dead ends: 229 [2021-07-09 17:32:20,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-07-09 17:32:20,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 206. [2021-07-09 17:32:20,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2439024390243905) internal successors, (460), 205 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 460 transitions. [2021-07-09 17:32:20,439 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 460 transitions. Word has length 19 [2021-07-09 17:32:20,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:20,439 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 460 transitions. [2021-07-09 17:32:20,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:20,439 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 460 transitions. [2021-07-09 17:32:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:20,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:20,439 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:20,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:20,640 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:20,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:20,640 INFO L82 PathProgramCache]: Analyzing trace with hash -837134980, now seen corresponding path program 382 times [2021-07-09 17:32:20,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:20,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272172595] [2021-07-09 17:32:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:20,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:20,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272172595] [2021-07-09 17:32:20,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272172595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:20,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596644095] [2021-07-09 17:32:20,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:20,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:20,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:20,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:20,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:20,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596644095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:20,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:20,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:20,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088937561] [2021-07-09 17:32:20,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:20,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:20,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:20,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:20,946 INFO L87 Difference]: Start difference. First operand 206 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:21,137 INFO L93 Difference]: Finished difference Result 212 states and 467 transitions. [2021-07-09 17:32:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:32:21,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:21,137 INFO L225 Difference]: With dead ends: 212 [2021-07-09 17:32:21,137 INFO L226 Difference]: Without dead ends: 206 [2021-07-09 17:32:21,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 347.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:21,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-07-09 17:32:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-07-09 17:32:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-07-09 17:32:21,139 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-07-09 17:32:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:21,139 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-07-09 17:32:21,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-07-09 17:32:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:21,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:21,140 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:21,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2880,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:21,340 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:21,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:21,340 INFO L82 PathProgramCache]: Analyzing trace with hash -362003303, now seen corresponding path program 383 times [2021-07-09 17:32:21,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:21,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900486373] [2021-07-09 17:32:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:21,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:21,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900486373] [2021-07-09 17:32:21,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900486373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:21,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34410684] [2021-07-09 17:32:21,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:21,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:21,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:21,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:21,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:21,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34410684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:21,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:21,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:21,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694511154] [2021-07-09 17:32:21,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:21,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:21,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:21,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:21,630 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:22,052 INFO L93 Difference]: Finished difference Result 239 states and 525 transitions. [2021-07-09 17:32:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:22,052 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:22,053 INFO L225 Difference]: With dead ends: 239 [2021-07-09 17:32:22,053 INFO L226 Difference]: Without dead ends: 239 [2021-07-09 17:32:22,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 481.5ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:22,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-07-09 17:32:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 207. [2021-07-09 17:32:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.237864077669903) internal successors, (461), 206 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-07-09 17:32:22,055 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-07-09 17:32:22,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:22,055 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-07-09 17:32:22,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:22,055 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-07-09 17:32:22,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:22,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:22,055 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:22,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2887,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:22,256 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:22,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:22,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1562128542, now seen corresponding path program 384 times [2021-07-09 17:32:22,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:22,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958604605] [2021-07-09 17:32:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:22,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:22,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958604605] [2021-07-09 17:32:22,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958604605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:22,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136610514] [2021-07-09 17:32:22,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:22,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:32:22,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:22,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:22,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:22,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136610514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:22,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:22,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:22,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603137597] [2021-07-09 17:32:22,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:22,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:22,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:22,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:22,603 INFO L87 Difference]: Start difference. First operand 207 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:22,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:22,814 INFO L93 Difference]: Finished difference Result 220 states and 487 transitions. [2021-07-09 17:32:22,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:32:22,815 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:22,815 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:32:22,815 INFO L226 Difference]: Without dead ends: 220 [2021-07-09 17:32:22,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 350.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:22,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-09 17:32:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2021-07-09 17:32:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-07-09 17:32:22,817 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-07-09 17:32:22,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:22,817 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-07-09 17:32:22,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:22,817 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-07-09 17:32:22,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:22,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:22,818 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:23,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-07-09 17:32:23,025 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:23,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1845138241, now seen corresponding path program 385 times [2021-07-09 17:32:23,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:23,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900916122] [2021-07-09 17:32:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:23,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:23,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900916122] [2021-07-09 17:32:23,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900916122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:23,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24173249] [2021-07-09 17:32:23,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:23,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:32:23,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:23,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24173249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:23,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:23,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:23,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284327108] [2021-07-09 17:32:23,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:23,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:23,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:23,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:23,365 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:23,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:23,597 INFO L93 Difference]: Finished difference Result 229 states and 505 transitions. [2021-07-09 17:32:23,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:23,598 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:23,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:23,598 INFO L225 Difference]: With dead ends: 229 [2021-07-09 17:32:23,598 INFO L226 Difference]: Without dead ends: 229 [2021-07-09 17:32:23,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 363.1ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:23,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-07-09 17:32:23,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 208. [2021-07-09 17:32:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:23,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-07-09 17:32:23,600 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-07-09 17:32:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:23,600 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-07-09 17:32:23,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-07-09 17:32:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:23,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:23,601 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:23,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2900,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:23,801 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:23,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:23,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1048402489, now seen corresponding path program 386 times [2021-07-09 17:32:23,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:23,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437430955] [2021-07-09 17:32:23,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:23,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:23,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437430955] [2021-07-09 17:32:23,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437430955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:23,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958168076] [2021-07-09 17:32:23,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:23,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:23,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:23,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:23,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:24,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958168076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:24,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:24,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:24,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749327050] [2021-07-09 17:32:24,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:24,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:24,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:24,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:24,095 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:24,370 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2021-07-09 17:32:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:24,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:24,371 INFO L225 Difference]: With dead ends: 236 [2021-07-09 17:32:24,371 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:32:24,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 376.2ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:32:24,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-07-09 17:32:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-07-09 17:32:24,373 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-07-09 17:32:24,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:24,373 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-07-09 17:32:24,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-07-09 17:32:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:24,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:24,373 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:24,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2908 [2021-07-09 17:32:24,574 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:24,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:24,574 INFO L82 PathProgramCache]: Analyzing trace with hash -760852254, now seen corresponding path program 387 times [2021-07-09 17:32:24,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:24,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300805243] [2021-07-09 17:32:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:24,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:24,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300805243] [2021-07-09 17:32:24,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300805243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:24,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210535551] [2021-07-09 17:32:24,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:24,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:24,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:24,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:24,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:24,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210535551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:24,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:24,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:24,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90045086] [2021-07-09 17:32:24,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:24,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:24,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:24,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:24,909 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:25,041 INFO L93 Difference]: Finished difference Result 219 states and 483 transitions. [2021-07-09 17:32:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:25,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:25,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:25,041 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:32:25,042 INFO L226 Difference]: Without dead ends: 219 [2021-07-09 17:32:25,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:25,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-09 17:32:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 205. [2021-07-09 17:32:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.230392156862745) internal successors, (455), 204 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 455 transitions. [2021-07-09 17:32:25,044 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 455 transitions. Word has length 19 [2021-07-09 17:32:25,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:25,044 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 455 transitions. [2021-07-09 17:32:25,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:25,044 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 455 transitions. [2021-07-09 17:32:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:25,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:25,044 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:25,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2915,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:25,245 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:25,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:25,245 INFO L82 PathProgramCache]: Analyzing trace with hash 585339870, now seen corresponding path program 388 times [2021-07-09 17:32:25,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:25,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414675453] [2021-07-09 17:32:25,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:25,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:25,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414675453] [2021-07-09 17:32:25,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414675453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:25,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363751749] [2021-07-09 17:32:25,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:25,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:25,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:25,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:25,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:25,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363751749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:25,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:25,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:25,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650175303] [2021-07-09 17:32:25,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:25,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:25,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:25,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:25,542 INFO L87 Difference]: Start difference. First operand 205 states and 455 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:25,860 INFO L93 Difference]: Finished difference Result 297 states and 613 transitions. [2021-07-09 17:32:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:32:25,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:25,860 INFO L225 Difference]: With dead ends: 297 [2021-07-09 17:32:25,860 INFO L226 Difference]: Without dead ends: 297 [2021-07-09 17:32:25,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-09 17:32:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 207. [2021-07-09 17:32:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.2427184466019416) internal successors, (462), 206 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 462 transitions. [2021-07-09 17:32:25,863 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 462 transitions. Word has length 19 [2021-07-09 17:32:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:25,863 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 462 transitions. [2021-07-09 17:32:25,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 462 transitions. [2021-07-09 17:32:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:25,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:25,863 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:26,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2923,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:26,064 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:26,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:26,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2080425983, now seen corresponding path program 389 times [2021-07-09 17:32:26,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:26,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624104832] [2021-07-09 17:32:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:26,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:26,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624104832] [2021-07-09 17:32:26,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624104832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:26,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760283645] [2021-07-09 17:32:26,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:26,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:32:26,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:26,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:26,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:26,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760283645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:26,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:26,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:26,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804230613] [2021-07-09 17:32:26,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:26,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:26,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:26,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:26,435 INFO L87 Difference]: Start difference. First operand 207 states and 462 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:26,642 INFO L93 Difference]: Finished difference Result 237 states and 509 transitions. [2021-07-09 17:32:26,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:26,642 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:26,643 INFO L225 Difference]: With dead ends: 237 [2021-07-09 17:32:26,643 INFO L226 Difference]: Without dead ends: 231 [2021-07-09 17:32:26,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:26,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-09 17:32:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 215. [2021-07-09 17:32:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2289719626168223) internal successors, (477), 214 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 477 transitions. [2021-07-09 17:32:26,645 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 477 transitions. Word has length 19 [2021-07-09 17:32:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:26,645 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 477 transitions. [2021-07-09 17:32:26,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 477 transitions. [2021-07-09 17:32:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:26,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:26,645 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:26,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2930 [2021-07-09 17:32:26,846 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:26,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:26,846 INFO L82 PathProgramCache]: Analyzing trace with hash 47484292, now seen corresponding path program 390 times [2021-07-09 17:32:26,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:26,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691932200] [2021-07-09 17:32:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:26,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:26,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691932200] [2021-07-09 17:32:26,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691932200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:26,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519406193] [2021-07-09 17:32:26,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:26,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:32:26,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:26,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:26,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:27,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519406193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:27,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:27,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:27,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782867504] [2021-07-09 17:32:27,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:27,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:27,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:27,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:27,140 INFO L87 Difference]: Start difference. First operand 215 states and 477 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:27,283 INFO L93 Difference]: Finished difference Result 241 states and 526 transitions. [2021-07-09 17:32:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:27,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:27,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:27,284 INFO L225 Difference]: With dead ends: 241 [2021-07-09 17:32:27,284 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 17:32:27,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:27,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 17:32:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 213. [2021-07-09 17:32:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-07-09 17:32:27,286 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-07-09 17:32:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:27,287 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-07-09 17:32:27,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,287 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-07-09 17:32:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:27,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:27,287 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:27,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2938,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:27,487 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:27,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:27,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1345459015, now seen corresponding path program 391 times [2021-07-09 17:32:27,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:27,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839314507] [2021-07-09 17:32:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:27,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:27,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839314507] [2021-07-09 17:32:27,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839314507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:27,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634894712] [2021-07-09 17:32:27,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:27,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:27,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:27,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634894712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:27,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:27,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:27,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480954330] [2021-07-09 17:32:27,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:27,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:27,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:27,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:27,767 INFO L87 Difference]: Start difference. First operand 213 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:27,961 INFO L93 Difference]: Finished difference Result 234 states and 512 transitions. [2021-07-09 17:32:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:27,962 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:27,962 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:32:27,962 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:32:27,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:32:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 213. [2021-07-09 17:32:27,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-07-09 17:32:27,964 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-07-09 17:32:27,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:27,964 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-07-09 17:32:27,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-07-09 17:32:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:27,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:27,965 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:28,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2943 [2021-07-09 17:32:28,165 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:28,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:28,165 INFO L82 PathProgramCache]: Analyzing trace with hash 274463551, now seen corresponding path program 392 times [2021-07-09 17:32:28,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:28,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014364181] [2021-07-09 17:32:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:28,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:28,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014364181] [2021-07-09 17:32:28,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014364181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:28,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654739503] [2021-07-09 17:32:28,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:28,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:28,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:28,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:28,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:28,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654739503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:28,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:28,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:28,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436737236] [2021-07-09 17:32:28,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:28,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:28,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:28,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:28,456 INFO L87 Difference]: Start difference. First operand 213 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:28,830 INFO L93 Difference]: Finished difference Result 246 states and 536 transitions. [2021-07-09 17:32:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:28,830 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:28,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:28,830 INFO L225 Difference]: With dead ends: 246 [2021-07-09 17:32:28,830 INFO L226 Difference]: Without dead ends: 246 [2021-07-09 17:32:28,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 456.9ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:28,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-09 17:32:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 214. [2021-07-09 17:32:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.215962441314554) internal successors, (472), 213 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 472 transitions. [2021-07-09 17:32:28,832 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 472 transitions. Word has length 19 [2021-07-09 17:32:28,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:28,833 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 472 transitions. [2021-07-09 17:32:28,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:28,833 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 472 transitions. [2021-07-09 17:32:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:28,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:28,833 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:29,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:29,033 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:29,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2096371900, now seen corresponding path program 393 times [2021-07-09 17:32:29,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:29,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017303154] [2021-07-09 17:32:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:29,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:29,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017303154] [2021-07-09 17:32:29,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017303154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:29,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335769503] [2021-07-09 17:32:29,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:29,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:29,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:29,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:32:29,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:29,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335769503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:29,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:29,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:29,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116765810] [2021-07-09 17:32:29,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:29,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:29,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:29,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:29,371 INFO L87 Difference]: Start difference. First operand 214 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:29,605 INFO L93 Difference]: Finished difference Result 227 states and 498 transitions. [2021-07-09 17:32:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:29,605 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:29,606 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:32:29,606 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:32:29,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:32:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2021-07-09 17:32:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-07-09 17:32:29,608 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-07-09 17:32:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:29,608 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-07-09 17:32:29,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-07-09 17:32:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:29,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:29,609 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:29,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2953 [2021-07-09 17:32:29,809 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1208671387, now seen corresponding path program 394 times [2021-07-09 17:32:29,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:29,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722295739] [2021-07-09 17:32:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:29,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:29,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722295739] [2021-07-09 17:32:29,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722295739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:29,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986666441] [2021-07-09 17:32:29,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:29,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:29,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:29,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:30,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986666441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:30,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:30,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:30,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239537727] [2021-07-09 17:32:30,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:30,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:30,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:30,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:30,110 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:30,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:30,304 INFO L93 Difference]: Finished difference Result 235 states and 514 transitions. [2021-07-09 17:32:30,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:30,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:30,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:30,305 INFO L225 Difference]: With dead ends: 235 [2021-07-09 17:32:30,305 INFO L226 Difference]: Without dead ends: 235 [2021-07-09 17:32:30,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-09 17:32:30,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 213. [2021-07-09 17:32:30,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-07-09 17:32:30,307 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-07-09 17:32:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:30,307 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-07-09 17:32:30,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-07-09 17:32:30,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:30,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:30,307 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:30,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2962,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:30,508 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:30,508 INFO L82 PathProgramCache]: Analyzing trace with hash -411935635, now seen corresponding path program 395 times [2021-07-09 17:32:30,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:30,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116418493] [2021-07-09 17:32:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:30,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:30,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116418493] [2021-07-09 17:32:30,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116418493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:30,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303656404] [2021-07-09 17:32:30,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:30,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:30,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:30,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:30,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:30,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303656404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:30,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:30,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:30,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819202222] [2021-07-09 17:32:30,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:30,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:30,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:30,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:30,815 INFO L87 Difference]: Start difference. First operand 213 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:31,132 INFO L93 Difference]: Finished difference Result 248 states and 540 transitions. [2021-07-09 17:32:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:31,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:31,132 INFO L225 Difference]: With dead ends: 248 [2021-07-09 17:32:31,132 INFO L226 Difference]: Without dead ends: 248 [2021-07-09 17:32:31,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-09 17:32:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 214. [2021-07-09 17:32:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.215962441314554) internal successors, (472), 213 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 472 transitions. [2021-07-09 17:32:31,135 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 472 transitions. Word has length 19 [2021-07-09 17:32:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:31,135 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 472 transitions. [2021-07-09 17:32:31,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:31,135 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 472 transitions. [2021-07-09 17:32:31,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:31,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:31,135 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:31,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2967,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:31,335 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:31,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:31,336 INFO L82 PathProgramCache]: Analyzing trace with hash -124385400, now seen corresponding path program 396 times [2021-07-09 17:32:31,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:31,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166654799] [2021-07-09 17:32:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:31,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:31,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166654799] [2021-07-09 17:32:31,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166654799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:31,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539947567] [2021-07-09 17:32:31,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:31,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:31,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:31,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:31,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:31,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539947567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:31,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:31,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:31,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619063921] [2021-07-09 17:32:31,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:31,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:31,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:31,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:31,670 INFO L87 Difference]: Start difference. First operand 214 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:31,909 INFO L93 Difference]: Finished difference Result 228 states and 502 transitions. [2021-07-09 17:32:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:32:31,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:31,909 INFO L225 Difference]: With dead ends: 228 [2021-07-09 17:32:31,909 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:32:31,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 379.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:31,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:32:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 212. [2021-07-09 17:32:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-07-09 17:32:31,912 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-07-09 17:32:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:31,912 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-07-09 17:32:31,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-07-09 17:32:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:31,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:31,912 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:32,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-07-09 17:32:32,113 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash -745435227, now seen corresponding path program 397 times [2021-07-09 17:32:32,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:32,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560358604] [2021-07-09 17:32:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:32,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:32,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560358604] [2021-07-09 17:32:32,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560358604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:32,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730257065] [2021-07-09 17:32:32,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:32,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:32,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:32,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730257065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:32,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:32,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:32,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336871227] [2021-07-09 17:32:32,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:32,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:32,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:32,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:32,474 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:32,698 INFO L93 Difference]: Finished difference Result 240 states and 513 transitions. [2021-07-09 17:32:32,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:32,699 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:32,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:32,699 INFO L225 Difference]: With dead ends: 240 [2021-07-09 17:32:32,699 INFO L226 Difference]: Without dead ends: 240 [2021-07-09 17:32:32,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-09 17:32:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 213. [2021-07-09 17:32:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.202830188679245) internal successors, (467), 212 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 467 transitions. [2021-07-09 17:32:32,701 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 467 transitions. Word has length 19 [2021-07-09 17:32:32,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:32,701 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 467 transitions. [2021-07-09 17:32:32,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 467 transitions. [2021-07-09 17:32:32,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:32,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:32,702 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:32,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-07-09 17:32:32,902 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:32,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:32,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1221806724, now seen corresponding path program 398 times [2021-07-09 17:32:32,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:32,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784664607] [2021-07-09 17:32:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:33,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:33,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784664607] [2021-07-09 17:32:33,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784664607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:33,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405347205] [2021-07-09 17:32:33,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:33,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:33,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:33,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:33,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:33,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405347205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:33,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:33,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:33,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380505706] [2021-07-09 17:32:33,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:33,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:33,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:33,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:33,214 INFO L87 Difference]: Start difference. First operand 213 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:33,396 INFO L93 Difference]: Finished difference Result 280 states and 590 transitions. [2021-07-09 17:32:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:33,396 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:33,397 INFO L225 Difference]: With dead ends: 280 [2021-07-09 17:32:33,397 INFO L226 Difference]: Without dead ends: 280 [2021-07-09 17:32:33,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 277.7ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:33,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-09 17:32:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 215. [2021-07-09 17:32:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2149532710280373) internal successors, (474), 214 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:33,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 474 transitions. [2021-07-09 17:32:33,399 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 474 transitions. Word has length 19 [2021-07-09 17:32:33,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:33,399 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 474 transitions. [2021-07-09 17:32:33,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:33,400 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 474 transitions. [2021-07-09 17:32:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:33,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:33,400 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:33,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2990,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:33,600 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:33,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1578074459, now seen corresponding path program 399 times [2021-07-09 17:32:33,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:33,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625179521] [2021-07-09 17:32:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:33,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:33,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625179521] [2021-07-09 17:32:33,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625179521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:33,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750570358] [2021-07-09 17:32:33,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:33,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:33,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:33,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:33,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:33,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750570358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:33,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:33,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:33,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710887618] [2021-07-09 17:32:33,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:33,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:33,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:33,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:33,962 INFO L87 Difference]: Start difference. First operand 215 states and 474 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:34,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:34,107 INFO L93 Difference]: Finished difference Result 225 states and 490 transitions. [2021-07-09 17:32:34,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:32:34,107 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:34,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:34,107 INFO L225 Difference]: With dead ends: 225 [2021-07-09 17:32:34,107 INFO L226 Difference]: Without dead ends: 219 [2021-07-09 17:32:34,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:34,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-09 17:32:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 212. [2021-07-09 17:32:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-07-09 17:32:34,109 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-07-09 17:32:34,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:34,109 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-07-09 17:32:34,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:34,109 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-07-09 17:32:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:34,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:34,110 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:34,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2997 [2021-07-09 17:32:34,310 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash 683951146, now seen corresponding path program 400 times [2021-07-09 17:32:34,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:34,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784471844] [2021-07-09 17:32:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:34,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:34,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784471844] [2021-07-09 17:32:34,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784471844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:34,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106247044] [2021-07-09 17:32:34,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:34,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:34,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:34,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:34,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:34,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106247044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:34,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:34,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:34,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720404603] [2021-07-09 17:32:34,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:34,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:34,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:34,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:34,611 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:34,772 INFO L93 Difference]: Finished difference Result 238 states and 517 transitions. [2021-07-09 17:32:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:32:34,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:34,773 INFO L225 Difference]: With dead ends: 238 [2021-07-09 17:32:34,773 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:32:34,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:32:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 208. [2021-07-09 17:32:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.207729468599034) internal successors, (457), 207 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 457 transitions. [2021-07-09 17:32:34,775 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 457 transitions. Word has length 19 [2021-07-09 17:32:34,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:34,775 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 457 transitions. [2021-07-09 17:32:34,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:34,775 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 457 transitions. [2021-07-09 17:32:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:34,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:34,776 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:34,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3005,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:34,976 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:34,976 INFO L82 PathProgramCache]: Analyzing trace with hash 58785791, now seen corresponding path program 401 times [2021-07-09 17:32:34,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:34,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037894983] [2021-07-09 17:32:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:35,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:35,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037894983] [2021-07-09 17:32:35,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037894983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:35,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056177071] [2021-07-09 17:32:35,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:35,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:32:35,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:35,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:32:35,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:35,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056177071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:35,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:35,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:35,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907754687] [2021-07-09 17:32:35,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:35,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:35,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:35,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:35,348 INFO L87 Difference]: Start difference. First operand 208 states and 457 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:35,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:35,561 INFO L93 Difference]: Finished difference Result 236 states and 513 transitions. [2021-07-09 17:32:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:35,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:35,562 INFO L225 Difference]: With dead ends: 236 [2021-07-09 17:32:35,562 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:32:35,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 333.1ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:32:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-07-09 17:32:35,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.207729468599034) internal successors, (457), 207 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 457 transitions. [2021-07-09 17:32:35,564 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 457 transitions. Word has length 19 [2021-07-09 17:32:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:35,564 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 457 transitions. [2021-07-09 17:32:35,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 457 transitions. [2021-07-09 17:32:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:35,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:35,564 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:35,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3010 [2021-07-09 17:32:35,765 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:35,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:35,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1982917636, now seen corresponding path program 402 times [2021-07-09 17:32:35,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:35,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932168627] [2021-07-09 17:32:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:35,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:35,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932168627] [2021-07-09 17:32:35,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932168627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:35,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480935521] [2021-07-09 17:32:35,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:35,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:32:35,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:35,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:32:35,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:36,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480935521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:36,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:36,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:32:36,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121932440] [2021-07-09 17:32:36,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:36,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:36,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:36,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:36,109 INFO L87 Difference]: Start difference. First operand 208 states and 457 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:36,624 INFO L93 Difference]: Finished difference Result 317 states and 654 transitions. [2021-07-09 17:32:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:32:36,624 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:36,625 INFO L225 Difference]: With dead ends: 317 [2021-07-09 17:32:36,625 INFO L226 Difference]: Without dead ends: 317 [2021-07-09 17:32:36,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 620.7ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:36,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-09 17:32:36,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 210. [2021-07-09 17:32:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.229665071770335) internal successors, (466), 209 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:36,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 466 transitions. [2021-07-09 17:32:36,627 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 466 transitions. Word has length 19 [2021-07-09 17:32:36,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:36,627 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 466 transitions. [2021-07-09 17:32:36,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:36,627 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 466 transitions. [2021-07-09 17:32:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:36,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:36,628 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:36,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:36,828 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:36,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1154672572, now seen corresponding path program 403 times [2021-07-09 17:32:36,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:36,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979195601] [2021-07-09 17:32:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:36,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:36,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979195601] [2021-07-09 17:32:36,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979195601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:36,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446892958] [2021-07-09 17:32:36,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:36,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:32:36,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:37,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446892958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:37,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:37,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:37,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188444170] [2021-07-09 17:32:37,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:37,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:37,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:37,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:37,185 INFO L87 Difference]: Start difference. First operand 210 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:37,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:37,523 INFO L93 Difference]: Finished difference Result 255 states and 545 transitions. [2021-07-09 17:32:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:37,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:37,524 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:32:37,524 INFO L226 Difference]: Without dead ends: 253 [2021-07-09 17:32:37,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 467.8ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:32:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-07-09 17:32:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2021-07-09 17:32:37,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.22488038277512) internal successors, (465), 209 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 465 transitions. [2021-07-09 17:32:37,526 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 465 transitions. Word has length 19 [2021-07-09 17:32:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:37,526 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 465 transitions. [2021-07-09 17:32:37,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:37,526 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 465 transitions. [2021-07-09 17:32:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:37,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:37,526 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:37,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3021 [2021-07-09 17:32:37,727 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:37,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:37,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1805703394, now seen corresponding path program 404 times [2021-07-09 17:32:37,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:37,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545417115] [2021-07-09 17:32:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:37,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:37,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545417115] [2021-07-09 17:32:37,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545417115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:37,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060268815] [2021-07-09 17:32:37,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:37,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:37,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:37,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:37,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:38,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060268815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:38,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:38,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:38,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129632756] [2021-07-09 17:32:38,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:38,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:38,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:38,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:38,036 INFO L87 Difference]: Start difference. First operand 210 states and 465 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:38,423 INFO L93 Difference]: Finished difference Result 265 states and 565 transitions. [2021-07-09 17:32:38,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:38,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:38,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:38,424 INFO L225 Difference]: With dead ends: 265 [2021-07-09 17:32:38,424 INFO L226 Difference]: Without dead ends: 265 [2021-07-09 17:32:38,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-09 17:32:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 209. [2021-07-09 17:32:38,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2163461538461537) internal successors, (461), 208 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 461 transitions. [2021-07-09 17:32:38,426 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 461 transitions. Word has length 19 [2021-07-09 17:32:38,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:38,426 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 461 transitions. [2021-07-09 17:32:38,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 461 transitions. [2021-07-09 17:32:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:38,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:38,427 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:38,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3028 [2021-07-09 17:32:38,627 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:38,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:38,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1951408324, now seen corresponding path program 405 times [2021-07-09 17:32:38,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:38,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236184225] [2021-07-09 17:32:38,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:38,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:38,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236184225] [2021-07-09 17:32:38,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236184225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:38,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826404666] [2021-07-09 17:32:38,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:38,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:38,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:38,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:38,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:38,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826404666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:38,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:38,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:38,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328795251] [2021-07-09 17:32:38,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:38,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:38,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:38,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:38,944 INFO L87 Difference]: Start difference. First operand 209 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:39,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:39,098 INFO L93 Difference]: Finished difference Result 237 states and 514 transitions. [2021-07-09 17:32:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:39,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:39,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:39,099 INFO L225 Difference]: With dead ends: 237 [2021-07-09 17:32:39,099 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 17:32:39,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 296.2ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:39,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 17:32:39,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 207. [2021-07-09 17:32:39,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.203883495145631) internal successors, (454), 206 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 454 transitions. [2021-07-09 17:32:39,101 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 454 transitions. Word has length 19 [2021-07-09 17:32:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:39,101 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 454 transitions. [2021-07-09 17:32:39,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 454 transitions. [2021-07-09 17:32:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:39,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:39,102 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:39,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:39,302 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:39,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1006128964, now seen corresponding path program 406 times [2021-07-09 17:32:39,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:39,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783691425] [2021-07-09 17:32:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:39,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:39,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783691425] [2021-07-09 17:32:39,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783691425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:39,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534598563] [2021-07-09 17:32:39,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:39,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:39,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:39,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:39,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:39,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534598563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:39,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:39,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:39,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689216982] [2021-07-09 17:32:39,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:39,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:39,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:39,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:39,597 INFO L87 Difference]: Start difference. First operand 207 states and 454 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:40,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:40,180 INFO L93 Difference]: Finished difference Result 294 states and 611 transitions. [2021-07-09 17:32:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:32:40,180 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:40,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:40,181 INFO L225 Difference]: With dead ends: 294 [2021-07-09 17:32:40,181 INFO L226 Difference]: Without dead ends: 294 [2021-07-09 17:32:40,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 554.8ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-09 17:32:40,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 209. [2021-07-09 17:32:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2211538461538463) internal successors, (462), 208 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:40,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 462 transitions. [2021-07-09 17:32:40,183 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 462 transitions. Word has length 19 [2021-07-09 17:32:40,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:40,183 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 462 transitions. [2021-07-09 17:32:40,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:40,183 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 462 transitions. [2021-07-09 17:32:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:40,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:40,184 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:40,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-07-09 17:32:40,384 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:40,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:40,384 INFO L82 PathProgramCache]: Analyzing trace with hash 468273386, now seen corresponding path program 407 times [2021-07-09 17:32:40,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:40,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339208905] [2021-07-09 17:32:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:40,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:40,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339208905] [2021-07-09 17:32:40,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339208905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:40,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761263420] [2021-07-09 17:32:40,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:40,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:40,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:40,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:32:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:40,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761263420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:40,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:40,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:40,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495263924] [2021-07-09 17:32:40,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:40,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:40,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:40,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:40,687 INFO L87 Difference]: Start difference. First operand 209 states and 462 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:41,064 INFO L93 Difference]: Finished difference Result 247 states and 536 transitions. [2021-07-09 17:32:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:41,064 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:41,064 INFO L225 Difference]: With dead ends: 247 [2021-07-09 17:32:41,064 INFO L226 Difference]: Without dead ends: 247 [2021-07-09 17:32:41,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:41,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-09 17:32:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 208. [2021-07-09 17:32:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.2222222222222223) internal successors, (460), 207 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:41,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 460 transitions. [2021-07-09 17:32:41,067 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 460 transitions. Word has length 19 [2021-07-09 17:32:41,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:41,067 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 460 transitions. [2021-07-09 17:32:41,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 460 transitions. [2021-07-09 17:32:41,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:41,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:41,068 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:41,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3047,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:41,268 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:41,268 INFO L82 PathProgramCache]: Analyzing trace with hash 974619652, now seen corresponding path program 408 times [2021-07-09 17:32:41,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:41,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255322619] [2021-07-09 17:32:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:41,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:41,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255322619] [2021-07-09 17:32:41,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255322619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:41,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856407719] [2021-07-09 17:32:41,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:41,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:41,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:41,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:32:41,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:41,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856407719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:41,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:41,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:41,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053131415] [2021-07-09 17:32:41,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:41,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:41,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:41,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:41,594 INFO L87 Difference]: Start difference. First operand 208 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:41,766 INFO L93 Difference]: Finished difference Result 241 states and 522 transitions. [2021-07-09 17:32:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:41,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:41,767 INFO L225 Difference]: With dead ends: 241 [2021-07-09 17:32:41,767 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 17:32:41,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 17:32:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 205. [2021-07-09 17:32:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-07-09 17:32:41,769 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-07-09 17:32:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:41,769 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-07-09 17:32:41,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-07-09 17:32:41,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:41,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:41,769 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:41,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3052 [2021-07-09 17:32:41,970 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:41,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:41,970 INFO L82 PathProgramCache]: Analyzing trace with hash -398904991, now seen corresponding path program 409 times [2021-07-09 17:32:41,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:41,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189044849] [2021-07-09 17:32:41,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:42,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:42,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189044849] [2021-07-09 17:32:42,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189044849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:42,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894117017] [2021-07-09 17:32:42,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:42,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:42,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:42,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894117017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:42,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:42,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:42,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090121583] [2021-07-09 17:32:42,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:42,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:42,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:42,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:42,268 INFO L87 Difference]: Start difference. First operand 205 states and 450 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:42,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:42,521 INFO L93 Difference]: Finished difference Result 226 states and 492 transitions. [2021-07-09 17:32:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:42,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:42,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:42,522 INFO L225 Difference]: With dead ends: 226 [2021-07-09 17:32:42,522 INFO L226 Difference]: Without dead ends: 226 [2021-07-09 17:32:42,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 274.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-09 17:32:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 205. [2021-07-09 17:32:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-07-09 17:32:42,524 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-07-09 17:32:42,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:42,524 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-07-09 17:32:42,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:42,524 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-07-09 17:32:42,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:42,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:42,524 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:42,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3057,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:42,725 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:42,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:42,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1469900455, now seen corresponding path program 410 times [2021-07-09 17:32:42,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:42,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893896810] [2021-07-09 17:32:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:42,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:42,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893896810] [2021-07-09 17:32:42,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893896810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:42,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384740355] [2021-07-09 17:32:42,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:42,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:42,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:42,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:32:42,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:43,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384740355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:43,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:43,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:43,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472011636] [2021-07-09 17:32:43,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:43,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:43,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:43,027 INFO L87 Difference]: Start difference. First operand 205 states and 450 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:43,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:43,451 INFO L93 Difference]: Finished difference Result 239 states and 518 transitions. [2021-07-09 17:32:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:43,452 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:43,452 INFO L225 Difference]: With dead ends: 239 [2021-07-09 17:32:43,452 INFO L226 Difference]: Without dead ends: 239 [2021-07-09 17:32:43,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 462.5ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:32:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-07-09 17:32:43,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 205. [2021-07-09 17:32:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-07-09 17:32:43,454 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-07-09 17:32:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:43,454 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-07-09 17:32:43,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-07-09 17:32:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:43,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:43,455 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:43,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3062,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:43,655 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:43,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:43,655 INFO L82 PathProgramCache]: Analyzing trace with hash -673164703, now seen corresponding path program 411 times [2021-07-09 17:32:43,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:43,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116642707] [2021-07-09 17:32:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:43,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:43,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116642707] [2021-07-09 17:32:43,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116642707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:43,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248904216] [2021-07-09 17:32:43,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:43,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:32:43,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:43,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:43,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:43,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248904216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:43,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:43,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:43,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79450634] [2021-07-09 17:32:43,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:43,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:43,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:43,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:43,962 INFO L87 Difference]: Start difference. First operand 205 states and 450 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:44,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:44,441 INFO L93 Difference]: Finished difference Result 247 states and 534 transitions. [2021-07-09 17:32:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:44,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:44,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:44,442 INFO L225 Difference]: With dead ends: 247 [2021-07-09 17:32:44,442 INFO L226 Difference]: Without dead ends: 247 [2021-07-09 17:32:44,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 488.1ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:44,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-09 17:32:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 205. [2021-07-09 17:32:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-07-09 17:32:44,444 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-07-09 17:32:44,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:44,444 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-07-09 17:32:44,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-07-09 17:32:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:44,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:44,445 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:44,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-07-09 17:32:44,645 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:44,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:44,645 INFO L82 PathProgramCache]: Analyzing trace with hash -385614468, now seen corresponding path program 412 times [2021-07-09 17:32:44,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:44,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619742833] [2021-07-09 17:32:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:44,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:44,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619742833] [2021-07-09 17:32:44,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619742833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:44,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937273122] [2021-07-09 17:32:44,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:44,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:44,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:44,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:44,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:44,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937273122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:44,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:44,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:44,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7488125] [2021-07-09 17:32:44,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:44,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:44,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:44,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:44,980 INFO L87 Difference]: Start difference. First operand 205 states and 450 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:45,183 INFO L93 Difference]: Finished difference Result 223 states and 485 transitions. [2021-07-09 17:32:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:45,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:45,183 INFO L225 Difference]: With dead ends: 223 [2021-07-09 17:32:45,183 INFO L226 Difference]: Without dead ends: 223 [2021-07-09 17:32:45,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 332.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:45,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-09 17:32:45,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 200. [2021-07-09 17:32:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.190954773869347) internal successors, (436), 199 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-07-09 17:32:45,185 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-07-09 17:32:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:45,186 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-07-09 17:32:45,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-07-09 17:32:45,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:45,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:45,186 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:45,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3074,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:45,386 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:45,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:45,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1341931903, now seen corresponding path program 413 times [2021-07-09 17:32:45,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:45,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91909638] [2021-07-09 17:32:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:45,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:45,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91909638] [2021-07-09 17:32:45,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91909638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:45,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577886365] [2021-07-09 17:32:45,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:45,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:45,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:45,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:45,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:45,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577886365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:45,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:45,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:45,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582978386] [2021-07-09 17:32:45,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:45,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:45,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:45,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:45,698 INFO L87 Difference]: Start difference. First operand 200 states and 436 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:46,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:46,004 INFO L93 Difference]: Finished difference Result 224 states and 484 transitions. [2021-07-09 17:32:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:46,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:46,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:46,005 INFO L225 Difference]: With dead ends: 224 [2021-07-09 17:32:46,005 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:32:46,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:32:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 200. [2021-07-09 17:32:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.190954773869347) internal successors, (436), 199 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-07-09 17:32:46,007 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-07-09 17:32:46,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:46,007 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-07-09 17:32:46,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:46,007 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-07-09 17:32:46,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:46,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:46,007 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:46,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3082 [2021-07-09 17:32:46,208 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:46,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2138667655, now seen corresponding path program 414 times [2021-07-09 17:32:46,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:46,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319385928] [2021-07-09 17:32:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:46,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:46,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319385928] [2021-07-09 17:32:46,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319385928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:46,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165261096] [2021-07-09 17:32:46,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:46,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:32:46,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:46,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:32:46,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:46,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165261096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:46,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:46,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:46,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647635305] [2021-07-09 17:32:46,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:46,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:46,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:46,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:46,561 INFO L87 Difference]: Start difference. First operand 200 states and 436 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:46,989 INFO L93 Difference]: Finished difference Result 241 states and 518 transitions. [2021-07-09 17:32:46,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:46,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:46,990 INFO L225 Difference]: With dead ends: 241 [2021-07-09 17:32:46,990 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 17:32:46,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 478.0ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:46,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 17:32:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 200. [2021-07-09 17:32:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.190954773869347) internal successors, (436), 199 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:46,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-07-09 17:32:46,992 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-07-09 17:32:46,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:46,992 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-07-09 17:32:46,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:46,992 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-07-09 17:32:46,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:46,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:46,993 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:47,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-07-09 17:32:47,193 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:47,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1868749406, now seen corresponding path program 415 times [2021-07-09 17:32:47,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:47,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127554374] [2021-07-09 17:32:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:47,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:47,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127554374] [2021-07-09 17:32:47,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127554374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:47,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194745276] [2021-07-09 17:32:47,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:47,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:47,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:47,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194745276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:47,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:47,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:47,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232942085] [2021-07-09 17:32:47,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:47,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:47,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:47,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:47,566 INFO L87 Difference]: Start difference. First operand 200 states and 436 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:47,845 INFO L93 Difference]: Finished difference Result 221 states and 480 transitions. [2021-07-09 17:32:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:47,845 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:32:47,845 INFO L226 Difference]: Without dead ends: 221 [2021-07-09 17:32:47,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-07-09 17:32:47,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 198. [2021-07-09 17:32:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1928934010152283) internal successors, (432), 197 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 432 transitions. [2021-07-09 17:32:47,847 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 432 transitions. Word has length 19 [2021-07-09 17:32:47,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:47,847 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 432 transitions. [2021-07-09 17:32:47,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:47,847 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 432 transitions. [2021-07-09 17:32:47,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:47,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:47,848 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:48,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3094,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:48,048 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:48,048 INFO L82 PathProgramCache]: Analyzing trace with hash -522557282, now seen corresponding path program 416 times [2021-07-09 17:32:48,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:48,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137436179] [2021-07-09 17:32:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:48,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:48,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137436179] [2021-07-09 17:32:48,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137436179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:48,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121670491] [2021-07-09 17:32:48,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:48,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:48,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:48,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:48,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121670491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:48,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:48,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:48,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899781630] [2021-07-09 17:32:48,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:48,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:48,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:48,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:48,390 INFO L87 Difference]: Start difference. First operand 198 states and 432 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:48,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:48,697 INFO L93 Difference]: Finished difference Result 255 states and 541 transitions. [2021-07-09 17:32:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:48,697 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:48,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:48,698 INFO L225 Difference]: With dead ends: 255 [2021-07-09 17:32:48,698 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:32:48,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 382.6ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:32:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:32:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-07-09 17:32:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.205) internal successors, (441), 200 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 441 transitions. [2021-07-09 17:32:48,700 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 441 transitions. Word has length 19 [2021-07-09 17:32:48,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:48,700 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 441 transitions. [2021-07-09 17:32:48,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:48,700 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 441 transitions. [2021-07-09 17:32:48,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:48,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:48,701 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:48,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3102,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:48,901 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1060412860, now seen corresponding path program 417 times [2021-07-09 17:32:48,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:48,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613869293] [2021-07-09 17:32:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:49,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:49,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613869293] [2021-07-09 17:32:49,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613869293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:49,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732017858] [2021-07-09 17:32:49,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:49,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:32:49,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:49,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:32:49,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:49,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732017858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:49,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:49,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:32:49,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991713539] [2021-07-09 17:32:49,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:49,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:49,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:49,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:49,265 INFO L87 Difference]: Start difference. First operand 201 states and 441 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:49,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:49,449 INFO L93 Difference]: Finished difference Result 234 states and 504 transitions. [2021-07-09 17:32:49,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:49,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:49,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:49,449 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:32:49,449 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:32:49,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:49,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:32:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2021-07-09 17:32:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.194871794871795) internal successors, (428), 195 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 428 transitions. [2021-07-09 17:32:49,452 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 428 transitions. Word has length 19 [2021-07-09 17:32:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:49,452 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 428 transitions. [2021-07-09 17:32:49,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 428 transitions. [2021-07-09 17:32:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:49,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:49,452 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:49,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3109,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:49,652 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1685578215, now seen corresponding path program 418 times [2021-07-09 17:32:49,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:49,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819347221] [2021-07-09 17:32:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:49,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:49,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819347221] [2021-07-09 17:32:49,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819347221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:49,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476104558] [2021-07-09 17:32:49,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:49,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:49,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:49,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:49,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:49,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476104558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:49,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:49,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:49,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246241153] [2021-07-09 17:32:49,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:49,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:49,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:49,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:49,994 INFO L87 Difference]: Start difference. First operand 196 states and 428 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:50,173 INFO L93 Difference]: Finished difference Result 221 states and 478 transitions. [2021-07-09 17:32:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:50,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:50,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:50,174 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:32:50,174 INFO L226 Difference]: Without dead ends: 221 [2021-07-09 17:32:50,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-07-09 17:32:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 197. [2021-07-09 17:32:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.193877551020408) internal successors, (430), 196 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 430 transitions. [2021-07-09 17:32:50,176 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 430 transitions. Word has length 19 [2021-07-09 17:32:50,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:50,176 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 430 transitions. [2021-07-09 17:32:50,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 430 transitions. [2021-07-09 17:32:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:50,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:50,176 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:50,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3114 [2021-07-09 17:32:50,377 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:50,377 INFO L82 PathProgramCache]: Analyzing trace with hash -888842463, now seen corresponding path program 419 times [2021-07-09 17:32:50,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:50,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963914412] [2021-07-09 17:32:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:50,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:50,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963914412] [2021-07-09 17:32:50,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963914412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:50,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056164879] [2021-07-09 17:32:50,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:50,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:32:50,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:50,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:50,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:50,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056164879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:50,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:50,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:50,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724360434] [2021-07-09 17:32:50,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:50,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:50,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:50,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:50,734 INFO L87 Difference]: Start difference. First operand 197 states and 430 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:50,954 INFO L93 Difference]: Finished difference Result 240 states and 513 transitions. [2021-07-09 17:32:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:50,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:50,955 INFO L225 Difference]: With dead ends: 240 [2021-07-09 17:32:50,955 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 17:32:50,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 17:32:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 198. [2021-07-09 17:32:50,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.197969543147208) internal successors, (433), 197 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 433 transitions. [2021-07-09 17:32:50,957 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 433 transitions. Word has length 19 [2021-07-09 17:32:50,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:50,957 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 433 transitions. [2021-07-09 17:32:50,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,957 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 433 transitions. [2021-07-09 17:32:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:50,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:50,958 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:51,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3119,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:51,158 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:51,158 INFO L82 PathProgramCache]: Analyzing trace with hash 238553630, now seen corresponding path program 420 times [2021-07-09 17:32:51,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:51,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087753269] [2021-07-09 17:32:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:51,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:51,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087753269] [2021-07-09 17:32:51,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087753269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:51,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530393685] [2021-07-09 17:32:51,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:51,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:32:51,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:51,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:51,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:51,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530393685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:51,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:51,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:51,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750607561] [2021-07-09 17:32:51,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:51,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:51,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:51,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:51,531 INFO L87 Difference]: Start difference. First operand 198 states and 433 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:51,731 INFO L93 Difference]: Finished difference Result 215 states and 464 transitions. [2021-07-09 17:32:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:51,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:51,731 INFO L225 Difference]: With dead ends: 215 [2021-07-09 17:32:51,732 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 17:32:51,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 17:32:51,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2021-07-09 17:32:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.194871794871795) internal successors, (428), 195 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 428 transitions. [2021-07-09 17:32:51,734 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 428 transitions. Word has length 19 [2021-07-09 17:32:51,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:51,734 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 428 transitions. [2021-07-09 17:32:51,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 428 transitions. [2021-07-09 17:32:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:51,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:51,735 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:51,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3126,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:51,935 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:51,936 INFO L82 PathProgramCache]: Analyzing trace with hash -382496197, now seen corresponding path program 421 times [2021-07-09 17:32:51,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:51,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211583068] [2021-07-09 17:32:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:52,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:52,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211583068] [2021-07-09 17:32:52,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211583068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:52,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587064050] [2021-07-09 17:32:52,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:52,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:52,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:52,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587064050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:52,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:52,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:52,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106104541] [2021-07-09 17:32:52,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:52,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:52,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:52,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:52,337 INFO L87 Difference]: Start difference. First operand 196 states and 428 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:52,619 INFO L93 Difference]: Finished difference Result 210 states and 456 transitions. [2021-07-09 17:32:52,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:32:52,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:52,620 INFO L225 Difference]: With dead ends: 210 [2021-07-09 17:32:52,620 INFO L226 Difference]: Without dead ends: 210 [2021-07-09 17:32:52,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 448.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:32:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-09 17:32:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 198. [2021-07-09 17:32:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1928934010152283) internal successors, (432), 197 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:52,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 432 transitions. [2021-07-09 17:32:52,622 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 432 transitions. Word has length 19 [2021-07-09 17:32:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:52,622 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 432 transitions. [2021-07-09 17:32:52,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 432 transitions. [2021-07-09 17:32:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:52,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:52,622 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:52,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:52,825 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:52,825 INFO L82 PathProgramCache]: Analyzing trace with hash -94945962, now seen corresponding path program 422 times [2021-07-09 17:32:52,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:52,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860146365] [2021-07-09 17:32:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:52,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:52,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860146365] [2021-07-09 17:32:52,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860146365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:52,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271696745] [2021-07-09 17:32:52,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:52,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:52,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:52,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:52,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:53,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271696745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:53,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:53,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:53,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472785093] [2021-07-09 17:32:53,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:53,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:53,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:53,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:53,162 INFO L87 Difference]: Start difference. First operand 198 states and 432 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:53,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:53,541 INFO L93 Difference]: Finished difference Result 252 states and 536 transitions. [2021-07-09 17:32:53,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:32:53,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:53,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:53,542 INFO L225 Difference]: With dead ends: 252 [2021-07-09 17:32:53,542 INFO L226 Difference]: Without dead ends: 252 [2021-07-09 17:32:53,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 459.7ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:32:53,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-09 17:32:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 199. [2021-07-09 17:32:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.207070707070707) internal successors, (437), 198 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:53,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 437 transitions. [2021-07-09 17:32:53,545 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 437 transitions. Word has length 19 [2021-07-09 17:32:53,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:53,545 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 437 transitions. [2021-07-09 17:32:53,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:53,545 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 437 transitions. [2021-07-09 17:32:53,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:53,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:53,546 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:53,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3142 [2021-07-09 17:32:53,746 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:53,747 INFO L82 PathProgramCache]: Analyzing trace with hash 207044318, now seen corresponding path program 423 times [2021-07-09 17:32:53,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:53,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804384478] [2021-07-09 17:32:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:53,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:53,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804384478] [2021-07-09 17:32:53,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804384478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:53,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878502217] [2021-07-09 17:32:53,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:53,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:53,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:53,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:53,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:54,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878502217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:54,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:54,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:54,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641278758] [2021-07-09 17:32:54,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:54,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:54,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:54,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:54,093 INFO L87 Difference]: Start difference. First operand 199 states and 437 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:54,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:54,302 INFO L93 Difference]: Finished difference Result 227 states and 490 transitions. [2021-07-09 17:32:54,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:32:54,302 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:54,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:54,302 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:32:54,303 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:32:54,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 330.6ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:32:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 195. [2021-07-09 17:32:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.195876288659794) internal successors, (426), 194 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 426 transitions. [2021-07-09 17:32:54,305 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 426 transitions. Word has length 19 [2021-07-09 17:32:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:54,305 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 426 transitions. [2021-07-09 17:32:54,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:54,305 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 426 transitions. [2021-07-09 17:32:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:54,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:54,305 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:54,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3149,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:54,506 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:54,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:54,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1865631135, now seen corresponding path program 424 times [2021-07-09 17:32:54,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:54,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312262633] [2021-07-09 17:32:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:54,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:54,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312262633] [2021-07-09 17:32:54,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312262633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:54,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069808342] [2021-07-09 17:32:54,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:54,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:54,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:54,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:54,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:54,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069808342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:54,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:54,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:54,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728342902] [2021-07-09 17:32:54,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:54,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:54,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:54,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:54,900 INFO L87 Difference]: Start difference. First operand 195 states and 426 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:55,159 INFO L93 Difference]: Finished difference Result 214 states and 462 transitions. [2021-07-09 17:32:55,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:55,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:55,159 INFO L225 Difference]: With dead ends: 214 [2021-07-09 17:32:55,159 INFO L226 Difference]: Without dead ends: 214 [2021-07-09 17:32:55,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:55,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-09 17:32:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 196. [2021-07-09 17:32:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1794871794871793) internal successors, (425), 195 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 425 transitions. [2021-07-09 17:32:55,162 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 425 transitions. Word has length 19 [2021-07-09 17:32:55,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:55,162 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 425 transitions. [2021-07-09 17:32:55,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,162 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 425 transitions. [2021-07-09 17:32:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:55,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:55,162 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:55,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3154 [2021-07-09 17:32:55,363 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:55,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:55,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1578080900, now seen corresponding path program 425 times [2021-07-09 17:32:55,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:55,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626252019] [2021-07-09 17:32:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:55,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:55,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626252019] [2021-07-09 17:32:55,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626252019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:55,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426473023] [2021-07-09 17:32:55,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:55,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:32:55,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:55,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:55,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:55,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426473023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:55,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:55,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:55,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746465172] [2021-07-09 17:32:55,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:55,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:55,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:55,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:55,691 INFO L87 Difference]: Start difference. First operand 196 states and 425 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:56,217 INFO L93 Difference]: Finished difference Result 263 states and 555 transitions. [2021-07-09 17:32:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:56,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:56,218 INFO L225 Difference]: With dead ends: 263 [2021-07-09 17:32:56,218 INFO L226 Difference]: Without dead ends: 263 [2021-07-09 17:32:56,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 573.3ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-09 17:32:56,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 198. [2021-07-09 17:32:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.197969543147208) internal successors, (433), 197 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 433 transitions. [2021-07-09 17:32:56,220 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 433 transitions. Word has length 19 [2021-07-09 17:32:56,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:56,220 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 433 transitions. [2021-07-09 17:32:56,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:56,220 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 433 transitions. [2021-07-09 17:32:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:56,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:56,220 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:56,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3162,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:56,421 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1276090620, now seen corresponding path program 426 times [2021-07-09 17:32:56,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:56,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945313135] [2021-07-09 17:32:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:56,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:56,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945313135] [2021-07-09 17:32:56,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945313135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:56,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398921824] [2021-07-09 17:32:56,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:56,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:32:56,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:56,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:56,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:56,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398921824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:56,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:56,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:56,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122140867] [2021-07-09 17:32:56,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:56,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:56,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:56,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:56,711 INFO L87 Difference]: Start difference. First operand 198 states and 433 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:57,075 INFO L93 Difference]: Finished difference Result 236 states and 507 transitions. [2021-07-09 17:32:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:57,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:57,076 INFO L225 Difference]: With dead ends: 236 [2021-07-09 17:32:57,076 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:32:57,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 419.3ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:32:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:32:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 197. [2021-07-09 17:32:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1989795918367347) internal successors, (431), 196 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 431 transitions. [2021-07-09 17:32:57,078 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 431 transitions. Word has length 19 [2021-07-09 17:32:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:57,078 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 431 transitions. [2021-07-09 17:32:57,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:57,078 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 431 transitions. [2021-07-09 17:32:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:57,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:57,078 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:57,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3169,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:57,288 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:57,288 INFO L82 PathProgramCache]: Analyzing trace with hash -769744354, now seen corresponding path program 427 times [2021-07-09 17:32:57,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:57,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409957039] [2021-07-09 17:32:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:57,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:57,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409957039] [2021-07-09 17:32:57,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409957039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:57,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602824709] [2021-07-09 17:32:57,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:57,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:57,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:57,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602824709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:57,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:57,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:57,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756010795] [2021-07-09 17:32:57,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:57,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:57,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:57,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:57,572 INFO L87 Difference]: Start difference. First operand 197 states and 431 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:57,750 INFO L93 Difference]: Finished difference Result 230 states and 493 transitions. [2021-07-09 17:32:57,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:32:57,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:57,751 INFO L225 Difference]: With dead ends: 230 [2021-07-09 17:32:57,751 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:32:57,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:32:57,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 191. [2021-07-09 17:32:57,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-07-09 17:32:57,753 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 19 [2021-07-09 17:32:57,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:57,753 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-07-09 17:32:57,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:57,753 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-07-09 17:32:57,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:57,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:57,753 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:57,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3174,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:57,954 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:57,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:57,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1049111361, now seen corresponding path program 428 times [2021-07-09 17:32:57,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:57,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854652529] [2021-07-09 17:32:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:58,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:58,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854652529] [2021-07-09 17:32:58,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854652529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:58,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703118194] [2021-07-09 17:32:58,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:58,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:58,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:58,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:32:58,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:58,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703118194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:58,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:58,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:58,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688469934] [2021-07-09 17:32:58,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:58,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:58,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:58,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:58,256 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:58,436 INFO L93 Difference]: Finished difference Result 217 states and 467 transitions. [2021-07-09 17:32:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:58,436 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:58,437 INFO L225 Difference]: With dead ends: 217 [2021-07-09 17:32:58,437 INFO L226 Difference]: Without dead ends: 217 [2021-07-09 17:32:58,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 261.1ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:58,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-09 17:32:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2021-07-09 17:32:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.183246073298429) internal successors, (417), 191 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 417 transitions. [2021-07-09 17:32:58,439 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 417 transitions. Word has length 19 [2021-07-09 17:32:58,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:58,439 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 417 transitions. [2021-07-09 17:32:58,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 417 transitions. [2021-07-09 17:32:58,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:58,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:58,439 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:58,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3179,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:58,640 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:58,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:58,640 INFO L82 PathProgramCache]: Analyzing trace with hash -252375609, now seen corresponding path program 429 times [2021-07-09 17:32:58,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:58,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157210690] [2021-07-09 17:32:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:58,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157210690] [2021-07-09 17:32:58,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157210690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890440446] [2021-07-09 17:32:58,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:58,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:32:58,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:58,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:32:58,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:58,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890440446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:58,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:58,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:32:58,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059259956] [2021-07-09 17:32:58,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:32:58,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:58,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:32:58,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:32:58,964 INFO L87 Difference]: Start difference. First operand 192 states and 417 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:59,165 INFO L93 Difference]: Finished difference Result 236 states and 502 transitions. [2021-07-09 17:32:59,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:32:59,165 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:59,166 INFO L225 Difference]: With dead ends: 236 [2021-07-09 17:32:59,166 INFO L226 Difference]: Without dead ends: 233 [2021-07-09 17:32:59,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:32:59,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-07-09 17:32:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 193. [2021-07-09 17:32:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1875) internal successors, (420), 192 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 420 transitions. [2021-07-09 17:32:59,168 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 420 transitions. Word has length 19 [2021-07-09 17:32:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:59,168 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 420 transitions. [2021-07-09 17:32:59,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 420 transitions. [2021-07-09 17:32:59,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:59,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:59,168 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:59,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-07-09 17:32:59,369 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:59,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:59,369 INFO L82 PathProgramCache]: Analyzing trace with hash 875020484, now seen corresponding path program 430 times [2021-07-09 17:32:59,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:59,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112213739] [2021-07-09 17:32:59,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:59,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:59,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112213739] [2021-07-09 17:32:59,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112213739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:59,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762997225] [2021-07-09 17:32:59,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:59,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:59,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:59,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:32:59,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:59,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762997225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:59,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:59,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:32:59,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132472308] [2021-07-09 17:32:59,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:32:59,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:59,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:32:59,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:32:59,710 INFO L87 Difference]: Start difference. First operand 193 states and 420 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:59,878 INFO L93 Difference]: Finished difference Result 211 states and 453 transitions. [2021-07-09 17:32:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:32:59,878 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:32:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:59,879 INFO L225 Difference]: With dead ends: 211 [2021-07-09 17:32:59,879 INFO L226 Difference]: Without dead ends: 209 [2021-07-09 17:32:59,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:32:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-07-09 17:32:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2021-07-09 17:32:59,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-07-09 17:32:59,881 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 19 [2021-07-09 17:32:59,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:59,881 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-07-09 17:32:59,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:59,881 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-07-09 17:32:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:32:59,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:59,881 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:00,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3192 [2021-07-09 17:33:00,082 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:00,082 INFO L82 PathProgramCache]: Analyzing trace with hash 253970657, now seen corresponding path program 431 times [2021-07-09 17:33:00,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:00,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479511332] [2021-07-09 17:33:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:00,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:00,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479511332] [2021-07-09 17:33:00,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479511332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:00,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317598101] [2021-07-09 17:33:00,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:00,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:00,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:00,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:00,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:00,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317598101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:00,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:00,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:00,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409706645] [2021-07-09 17:33:00,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:00,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:00,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:00,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:00,450 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:00,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:00,631 INFO L93 Difference]: Finished difference Result 208 states and 449 transitions. [2021-07-09 17:33:00,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:00,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:00,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:00,632 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:33:00,632 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:33:00,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 337.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:33:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:33:00,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 193. [2021-07-09 17:33:00,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1822916666666665) internal successors, (419), 192 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 419 transitions. [2021-07-09 17:33:00,634 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 419 transitions. Word has length 19 [2021-07-09 17:33:00,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:00,634 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 419 transitions. [2021-07-09 17:33:00,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 419 transitions. [2021-07-09 17:33:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:00,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:00,634 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:00,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3200,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:00,835 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:00,835 INFO L82 PathProgramCache]: Analyzing trace with hash 541520892, now seen corresponding path program 432 times [2021-07-09 17:33:00,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:00,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195389067] [2021-07-09 17:33:00,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:00,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:00,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195389067] [2021-07-09 17:33:00,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195389067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:00,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959624364] [2021-07-09 17:33:00,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:00,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:00,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:00,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:00,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:01,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959624364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:01,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:01,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:01,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610643928] [2021-07-09 17:33:01,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:01,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:01,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:01,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:01,153 INFO L87 Difference]: Start difference. First operand 193 states and 419 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:01,479 INFO L93 Difference]: Finished difference Result 243 states and 515 transitions. [2021-07-09 17:33:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:01,480 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:01,480 INFO L225 Difference]: With dead ends: 243 [2021-07-09 17:33:01,480 INFO L226 Difference]: Without dead ends: 243 [2021-07-09 17:33:01,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:01,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-09 17:33:01,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 194. [2021-07-09 17:33:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1968911917098444) internal successors, (424), 193 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 424 transitions. [2021-07-09 17:33:01,482 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 424 transitions. Word has length 19 [2021-07-09 17:33:01,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:01,482 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 424 transitions. [2021-07-09 17:33:01,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 424 transitions. [2021-07-09 17:33:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:01,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:01,483 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:01,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-07-09 17:33:01,683 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:01,684 INFO L82 PathProgramCache]: Analyzing trace with hash 843511172, now seen corresponding path program 433 times [2021-07-09 17:33:01,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:01,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715102726] [2021-07-09 17:33:01,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:01,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:01,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715102726] [2021-07-09 17:33:01,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715102726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:01,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599913225] [2021-07-09 17:33:01,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:01,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:01,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:01,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599913225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:01,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:01,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:01,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109107356] [2021-07-09 17:33:01,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:01,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:01,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:01,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:01,990 INFO L87 Difference]: Start difference. First operand 194 states and 424 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:02,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:02,201 INFO L93 Difference]: Finished difference Result 220 states and 473 transitions. [2021-07-09 17:33:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:02,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:02,202 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:33:02,202 INFO L226 Difference]: Without dead ends: 220 [2021-07-09 17:33:02,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 310.4ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:02,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-09 17:33:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2021-07-09 17:33:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.185185185185185) internal successors, (413), 189 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 413 transitions. [2021-07-09 17:33:02,204 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 413 transitions. Word has length 19 [2021-07-09 17:33:02,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:02,204 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 413 transitions. [2021-07-09 17:33:02,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:02,204 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 413 transitions. [2021-07-09 17:33:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:02,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:02,204 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:02,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3215,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:02,405 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash -101768188, now seen corresponding path program 434 times [2021-07-09 17:33:02,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:02,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228708823] [2021-07-09 17:33:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:02,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:02,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228708823] [2021-07-09 17:33:02,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228708823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:02,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661094267] [2021-07-09 17:33:02,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:02,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:02,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:02,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:33:02,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:02,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661094267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:02,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:02,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:02,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658611179] [2021-07-09 17:33:02,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:02,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:02,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:02,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:02,740 INFO L87 Difference]: Start difference. First operand 190 states and 413 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:03,326 INFO L93 Difference]: Finished difference Result 262 states and 552 transitions. [2021-07-09 17:33:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:03,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:03,326 INFO L225 Difference]: With dead ends: 262 [2021-07-09 17:33:03,327 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:33:03,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 640.8ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:33:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:33:03,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 193. [2021-07-09 17:33:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.203125) internal successors, (423), 192 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 423 transitions. [2021-07-09 17:33:03,329 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 423 transitions. Word has length 19 [2021-07-09 17:33:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:03,329 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 423 transitions. [2021-07-09 17:33:03,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 423 transitions. [2021-07-09 17:33:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:03,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:03,329 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:03,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3220 [2021-07-09 17:33:03,545 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash -639623766, now seen corresponding path program 435 times [2021-07-09 17:33:03,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:03,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265664004] [2021-07-09 17:33:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:03,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:03,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265664004] [2021-07-09 17:33:03,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265664004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:03,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773943847] [2021-07-09 17:33:03,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:03,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:03,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:03,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:03,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:03,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773943847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:03,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:03,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:03,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92992790] [2021-07-09 17:33:03,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:03,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:03,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:03,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:03,835 INFO L87 Difference]: Start difference. First operand 193 states and 423 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:04,243 INFO L93 Difference]: Finished difference Result 231 states and 497 transitions. [2021-07-09 17:33:04,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:04,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:04,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:04,244 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:33:04,244 INFO L226 Difference]: Without dead ends: 231 [2021-07-09 17:33:04,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 486.4ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:33:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-09 17:33:04,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 193. [2021-07-09 17:33:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.203125) internal successors, (423), 192 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 423 transitions. [2021-07-09 17:33:04,246 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 423 transitions. Word has length 19 [2021-07-09 17:33:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:04,246 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 423 transitions. [2021-07-09 17:33:04,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 423 transitions. [2021-07-09 17:33:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:04,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:04,247 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:04,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3226,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:04,447 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:04,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:04,447 INFO L82 PathProgramCache]: Analyzing trace with hash -133277500, now seen corresponding path program 436 times [2021-07-09 17:33:04,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:04,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343492579] [2021-07-09 17:33:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:04,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:04,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343492579] [2021-07-09 17:33:04,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343492579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:04,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845274622] [2021-07-09 17:33:04,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:04,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:04,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:04,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:04,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:04,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845274622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:04,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:04,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:04,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201283420] [2021-07-09 17:33:04,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:04,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:04,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:04,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:04,736 INFO L87 Difference]: Start difference. First operand 193 states and 423 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:04,950 INFO L93 Difference]: Finished difference Result 226 states and 485 transitions. [2021-07-09 17:33:04,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:04,951 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:04,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:04,951 INFO L225 Difference]: With dead ends: 226 [2021-07-09 17:33:04,951 INFO L226 Difference]: Without dead ends: 226 [2021-07-09 17:33:04,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-09 17:33:04,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 190. [2021-07-09 17:33:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.185185185185185) internal successors, (413), 189 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 413 transitions. [2021-07-09 17:33:04,953 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 413 transitions. Word has length 19 [2021-07-09 17:33:04,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:04,953 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 413 transitions. [2021-07-09 17:33:04,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 413 transitions. [2021-07-09 17:33:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:04,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:04,953 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:05,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3231 [2021-07-09 17:33:05,154 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:05,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:05,154 INFO L82 PathProgramCache]: Analyzing trace with hash 38292897, now seen corresponding path program 437 times [2021-07-09 17:33:05,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:05,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203881397] [2021-07-09 17:33:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:05,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:05,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203881397] [2021-07-09 17:33:05,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203881397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:05,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056465441] [2021-07-09 17:33:05,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:05,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:05,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:05,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:05,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:05,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056465441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:05,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:05,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:05,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120810115] [2021-07-09 17:33:05,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:05,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:05,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:05,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:05,540 INFO L87 Difference]: Start difference. First operand 190 states and 413 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:06,002 INFO L93 Difference]: Finished difference Result 216 states and 461 transitions. [2021-07-09 17:33:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:06,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:06,003 INFO L225 Difference]: With dead ends: 216 [2021-07-09 17:33:06,003 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:33:06,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 580.9ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:33:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 193. [2021-07-09 17:33:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1822916666666665) internal successors, (419), 192 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 419 transitions. [2021-07-09 17:33:06,005 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 419 transitions. Word has length 19 [2021-07-09 17:33:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:06,005 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 419 transitions. [2021-07-09 17:33:06,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 419 transitions. [2021-07-09 17:33:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:06,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:06,005 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:06,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:06,206 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:06,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:06,206 INFO L82 PathProgramCache]: Analyzing trace with hash 325843132, now seen corresponding path program 438 times [2021-07-09 17:33:06,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:06,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71036787] [2021-07-09 17:33:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:06,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71036787] [2021-07-09 17:33:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71036787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061302397] [2021-07-09 17:33:06,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:06,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:06,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:06,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:06,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:06,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061302397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:06,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:06,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:06,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489308786] [2021-07-09 17:33:06,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:06,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:06,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:06,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:06,513 INFO L87 Difference]: Start difference. First operand 193 states and 419 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:07,144 INFO L93 Difference]: Finished difference Result 254 states and 537 transitions. [2021-07-09 17:33:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:33:07,144 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:07,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:07,144 INFO L225 Difference]: With dead ends: 254 [2021-07-09 17:33:07,144 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:33:07,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 695.7ms TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:33:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:33:07,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 196. [2021-07-09 17:33:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.2051282051282053) internal successors, (430), 195 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 430 transitions. [2021-07-09 17:33:07,146 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 430 transitions. Word has length 19 [2021-07-09 17:33:07,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:07,146 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 430 transitions. [2021-07-09 17:33:07,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 430 transitions. [2021-07-09 17:33:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:07,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:07,147 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:07,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:07,347 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:07,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:07,347 INFO L82 PathProgramCache]: Analyzing trace with hash 627833412, now seen corresponding path program 439 times [2021-07-09 17:33:07,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:07,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947706877] [2021-07-09 17:33:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:07,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:07,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947706877] [2021-07-09 17:33:07,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947706877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:07,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788672134] [2021-07-09 17:33:07,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:07,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:07,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:07,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788672134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:07,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:07,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:07,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803795936] [2021-07-09 17:33:07,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:07,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:07,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:07,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:07,663 INFO L87 Difference]: Start difference. First operand 196 states and 430 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:08,252 INFO L93 Difference]: Finished difference Result 241 states and 517 transitions. [2021-07-09 17:33:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:33:08,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:08,253 INFO L225 Difference]: With dead ends: 241 [2021-07-09 17:33:08,253 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 17:33:08,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 619.5ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:08,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 17:33:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 195. [2021-07-09 17:33:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.2061855670103094) internal successors, (428), 194 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 428 transitions. [2021-07-09 17:33:08,255 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 428 transitions. Word has length 19 [2021-07-09 17:33:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:08,255 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 428 transitions. [2021-07-09 17:33:08,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 428 transitions. [2021-07-09 17:33:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:08,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:08,255 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:08,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3251,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:08,456 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:08,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1134179678, now seen corresponding path program 440 times [2021-07-09 17:33:08,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:08,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784645285] [2021-07-09 17:33:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:08,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:08,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784645285] [2021-07-09 17:33:08,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784645285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:08,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770450358] [2021-07-09 17:33:08,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:08,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:08,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:08,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:08,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:08,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770450358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:08,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:08,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:08,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525151870] [2021-07-09 17:33:08,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:08,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:08,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:08,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:08,753 INFO L87 Difference]: Start difference. First operand 195 states and 428 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:09,280 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-07-09 17:33:09,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:09,280 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:09,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:09,281 INFO L225 Difference]: With dead ends: 238 [2021-07-09 17:33:09,281 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:33:09,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 556.3ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:33:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:33:09,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 194. [2021-07-09 17:33:09,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.2072538860103625) internal successors, (426), 193 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 426 transitions. [2021-07-09 17:33:09,283 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 426 transitions. Word has length 19 [2021-07-09 17:33:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:09,283 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 426 transitions. [2021-07-09 17:33:09,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 426 transitions. [2021-07-09 17:33:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:09,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:09,283 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:09,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3256,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:09,484 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:09,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:09,484 INFO L82 PathProgramCache]: Analyzing trace with hash -348955260, now seen corresponding path program 441 times [2021-07-09 17:33:09,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:09,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274870728] [2021-07-09 17:33:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:09,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:09,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274870728] [2021-07-09 17:33:09,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274870728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:09,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966595114] [2021-07-09 17:33:09,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:09,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:09,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:09,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:33:09,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:09,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966595114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:09,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:09,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:09,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72458066] [2021-07-09 17:33:09,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:09,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:09,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:09,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:09,774 INFO L87 Difference]: Start difference. First operand 194 states and 426 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:10,053 INFO L93 Difference]: Finished difference Result 218 states and 469 transitions. [2021-07-09 17:33:10,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:10,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:10,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:10,054 INFO L225 Difference]: With dead ends: 218 [2021-07-09 17:33:10,054 INFO L226 Difference]: Without dead ends: 218 [2021-07-09 17:33:10,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:10,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-07-09 17:33:10,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 189. [2021-07-09 17:33:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-07-09 17:33:10,058 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-07-09 17:33:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:10,059 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-07-09 17:33:10,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-07-09 17:33:10,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:10,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:10,059 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:10,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:10,259 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:10,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:10,260 INFO L82 PathProgramCache]: Analyzing trace with hash -657700315, now seen corresponding path program 442 times [2021-07-09 17:33:10,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:10,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482097995] [2021-07-09 17:33:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:10,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:10,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482097995] [2021-07-09 17:33:10,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482097995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:10,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611236510] [2021-07-09 17:33:10,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:10,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:10,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:10,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:10,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:10,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611236510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:10,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:10,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:10,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679312019] [2021-07-09 17:33:10,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:10,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:10,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:10,574 INFO L87 Difference]: Start difference. First operand 189 states and 411 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:10,670 INFO L93 Difference]: Finished difference Result 198 states and 429 transitions. [2021-07-09 17:33:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:10,670 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:10,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:10,671 INFO L225 Difference]: With dead ends: 198 [2021-07-09 17:33:10,671 INFO L226 Difference]: Without dead ends: 198 [2021-07-09 17:33:10,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:10,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-07-09 17:33:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 189. [2021-07-09 17:33:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-07-09 17:33:10,673 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-07-09 17:33:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:10,673 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-07-09 17:33:10,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-07-09 17:33:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:10,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:10,673 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:10,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3266,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:10,874 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:10,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:10,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1728695779, now seen corresponding path program 443 times [2021-07-09 17:33:10,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:10,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278570440] [2021-07-09 17:33:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:10,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:10,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278570440] [2021-07-09 17:33:10,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278570440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:10,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409067401] [2021-07-09 17:33:10,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:10,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:10,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:10,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:10,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:11,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409067401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:11,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:11,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:11,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926978502] [2021-07-09 17:33:11,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:11,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:11,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:11,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:11,176 INFO L87 Difference]: Start difference. First operand 189 states and 411 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:11,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:11,501 INFO L93 Difference]: Finished difference Result 207 states and 447 transitions. [2021-07-09 17:33:11,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:11,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:11,501 INFO L225 Difference]: With dead ends: 207 [2021-07-09 17:33:11,501 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:33:11,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:33:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-07-09 17:33:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-07-09 17:33:11,503 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-07-09 17:33:11,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:11,503 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-07-09 17:33:11,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-07-09 17:33:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:11,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:11,504 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:11,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3271 [2021-07-09 17:33:11,704 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:11,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:11,704 INFO L82 PathProgramCache]: Analyzing trace with hash -931960027, now seen corresponding path program 444 times [2021-07-09 17:33:11,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:11,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416343101] [2021-07-09 17:33:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:11,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:11,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416343101] [2021-07-09 17:33:11,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416343101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:11,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088798614] [2021-07-09 17:33:11,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:12,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:33:12,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:12,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:12,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:12,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088798614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:12,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:12,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:12,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948357684] [2021-07-09 17:33:12,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:12,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:12,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:12,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:12,179 INFO L87 Difference]: Start difference. First operand 189 states and 411 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:12,549 INFO L93 Difference]: Finished difference Result 207 states and 447 transitions. [2021-07-09 17:33:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:12,549 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:12,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:12,549 INFO L225 Difference]: With dead ends: 207 [2021-07-09 17:33:12,549 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:33:12,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 425.5ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:33:12,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-07-09 17:33:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-07-09 17:33:12,551 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-07-09 17:33:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:12,551 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-07-09 17:33:12,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:12,552 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-07-09 17:33:12,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:12,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:12,552 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:12,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-07-09 17:33:12,757 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash -644409792, now seen corresponding path program 445 times [2021-07-09 17:33:12,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:12,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612375620] [2021-07-09 17:33:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:12,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:12,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612375620] [2021-07-09 17:33:12,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612375620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:12,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78060113] [2021-07-09 17:33:12,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:12,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:12,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:13,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78060113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:13,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:13,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:13,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284722784] [2021-07-09 17:33:13,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:13,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:13,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:13,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:13,098 INFO L87 Difference]: Start difference. First operand 189 states and 411 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:13,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:13,244 INFO L93 Difference]: Finished difference Result 199 states and 430 transitions. [2021-07-09 17:33:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:33:13,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:13,244 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:33:13,244 INFO L226 Difference]: Without dead ends: 199 [2021-07-09 17:33:13,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:13,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-09 17:33:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 184. [2021-07-09 17:33:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.169398907103825) internal successors, (397), 183 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 397 transitions. [2021-07-09 17:33:13,246 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 397 transitions. Word has length 19 [2021-07-09 17:33:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:13,246 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 397 transitions. [2021-07-09 17:33:13,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 397 transitions. [2021-07-09 17:33:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:13,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:13,247 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:13,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3283,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:13,447 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:13,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:13,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1083136579, now seen corresponding path program 446 times [2021-07-09 17:33:13,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:13,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240589817] [2021-07-09 17:33:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:13,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:13,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240589817] [2021-07-09 17:33:13,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240589817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:13,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984093431] [2021-07-09 17:33:13,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:13,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:13,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:13,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:33:13,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:13,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984093431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:13,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:13,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:13,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676179462] [2021-07-09 17:33:13,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:13,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:13,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:13,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:13,766 INFO L87 Difference]: Start difference. First operand 184 states and 397 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:14,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:14,099 INFO L93 Difference]: Finished difference Result 207 states and 443 transitions. [2021-07-09 17:33:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:14,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:14,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:14,100 INFO L225 Difference]: With dead ends: 207 [2021-07-09 17:33:14,100 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:33:14,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 371.3ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:33:14,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 184. [2021-07-09 17:33:14,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.169398907103825) internal successors, (397), 183 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 397 transitions. [2021-07-09 17:33:14,102 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 397 transitions. Word has length 19 [2021-07-09 17:33:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:14,102 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 397 transitions. [2021-07-09 17:33:14,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:14,102 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 397 transitions. [2021-07-09 17:33:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:14,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:14,102 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:14,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3291 [2021-07-09 17:33:14,302 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:14,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:14,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1879872331, now seen corresponding path program 447 times [2021-07-09 17:33:14,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:14,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213042384] [2021-07-09 17:33:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:14,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:14,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213042384] [2021-07-09 17:33:14,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213042384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:14,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378874409] [2021-07-09 17:33:14,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:14,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:33:14,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:14,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:33:14,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:14,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378874409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:14,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:14,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:14,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355881548] [2021-07-09 17:33:14,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:14,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:14,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:14,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:14,683 INFO L87 Difference]: Start difference. First operand 184 states and 397 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:15,128 INFO L93 Difference]: Finished difference Result 223 states and 470 transitions. [2021-07-09 17:33:15,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:15,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:15,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:15,128 INFO L225 Difference]: With dead ends: 223 [2021-07-09 17:33:15,128 INFO L226 Difference]: Without dead ends: 220 [2021-07-09 17:33:15,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 552.8ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:33:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-09 17:33:15,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 184. [2021-07-09 17:33:15,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1639344262295084) internal successors, (396), 183 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 396 transitions. [2021-07-09 17:33:15,130 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 396 transitions. Word has length 19 [2021-07-09 17:33:15,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:15,130 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 396 transitions. [2021-07-09 17:33:15,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,130 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 396 transitions. [2021-07-09 17:33:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:15,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:15,131 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:15,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3296 [2021-07-09 17:33:15,331 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:15,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1287698872, now seen corresponding path program 448 times [2021-07-09 17:33:15,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:15,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865188678] [2021-07-09 17:33:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:15,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:15,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865188678] [2021-07-09 17:33:15,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865188678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:15,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471320130] [2021-07-09 17:33:15,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:15,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:15,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:15,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:15,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:15,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471320130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:15,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:15,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:15,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487194559] [2021-07-09 17:33:15,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:15,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:15,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:15,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:15,677 INFO L87 Difference]: Start difference. First operand 184 states and 396 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:15,967 INFO L93 Difference]: Finished difference Result 199 states and 423 transitions. [2021-07-09 17:33:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:15,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:15,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:15,968 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:33:15,968 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:33:15,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:33:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 182. [2021-07-09 17:33:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.160220994475138) internal successors, (391), 181 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 391 transitions. [2021-07-09 17:33:15,970 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 391 transitions. Word has length 19 [2021-07-09 17:33:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:15,970 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 391 transitions. [2021-07-09 17:33:15,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 391 transitions. [2021-07-09 17:33:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:15,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:15,970 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:16,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3304,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:16,170 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:16,171 INFO L82 PathProgramCache]: Analyzing trace with hash -781352606, now seen corresponding path program 449 times [2021-07-09 17:33:16,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:16,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582112327] [2021-07-09 17:33:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:16,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582112327] [2021-07-09 17:33:16,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582112327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604535040] [2021-07-09 17:33:16,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:16,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:33:16,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:16,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:16,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:16,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604535040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:16,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:16,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:16,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791521346] [2021-07-09 17:33:16,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:16,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:16,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:16,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:16,492 INFO L87 Difference]: Start difference. First operand 182 states and 391 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:16,838 INFO L93 Difference]: Finished difference Result 266 states and 541 transitions. [2021-07-09 17:33:16,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:33:16,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:16,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:16,838 INFO L225 Difference]: With dead ends: 266 [2021-07-09 17:33:16,838 INFO L226 Difference]: Without dead ends: 266 [2021-07-09 17:33:16,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 399.3ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-09 17:33:16,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 185. [2021-07-09 17:33:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1739130434782608) internal successors, (400), 184 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 400 transitions. [2021-07-09 17:33:16,841 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 400 transitions. Word has length 19 [2021-07-09 17:33:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:16,841 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 400 transitions. [2021-07-09 17:33:16,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:16,841 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 400 transitions. [2021-07-09 17:33:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:16,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:16,841 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:17,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3312,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:17,042 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:17,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:17,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1319208184, now seen corresponding path program 450 times [2021-07-09 17:33:17,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:17,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308196004] [2021-07-09 17:33:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:17,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:17,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308196004] [2021-07-09 17:33:17,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308196004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:17,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449879239] [2021-07-09 17:33:17,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:17,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:33:17,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:17,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:17,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:17,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449879239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:17,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:17,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:17,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131025355] [2021-07-09 17:33:17,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:17,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:17,358 INFO L87 Difference]: Start difference. First operand 185 states and 400 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:17,536 INFO L93 Difference]: Finished difference Result 211 states and 449 transitions. [2021-07-09 17:33:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:17,536 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:17,537 INFO L225 Difference]: With dead ends: 211 [2021-07-09 17:33:17,537 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:33:17,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:33:17,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:33:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2021-07-09 17:33:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1620111731843576) internal successors, (387), 179 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 387 transitions. [2021-07-09 17:33:17,539 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 387 transitions. Word has length 19 [2021-07-09 17:33:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:17,539 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 387 transitions. [2021-07-09 17:33:17,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 387 transitions. [2021-07-09 17:33:17,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:17,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:17,539 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:17,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-07-09 17:33:17,739 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:17,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1944373539, now seen corresponding path program 451 times [2021-07-09 17:33:17,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:17,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082010912] [2021-07-09 17:33:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:17,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:17,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082010912] [2021-07-09 17:33:17,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082010912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:17,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34104850] [2021-07-09 17:33:17,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:17,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:17,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:18,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34104850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:18,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:18,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:18,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005207391] [2021-07-09 17:33:18,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:18,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:18,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:18,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:18,047 INFO L87 Difference]: Start difference. First operand 180 states and 387 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:18,309 INFO L93 Difference]: Finished difference Result 206 states and 438 transitions. [2021-07-09 17:33:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:18,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:18,309 INFO L225 Difference]: With dead ends: 206 [2021-07-09 17:33:18,309 INFO L226 Difference]: Without dead ends: 206 [2021-07-09 17:33:18,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 360.2ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-07-09 17:33:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 180. [2021-07-09 17:33:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1620111731843576) internal successors, (387), 179 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 387 transitions. [2021-07-09 17:33:18,311 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 387 transitions. Word has length 19 [2021-07-09 17:33:18,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:18,311 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 387 transitions. [2021-07-09 17:33:18,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:18,311 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 387 transitions. [2021-07-09 17:33:18,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:18,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:18,312 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:18,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3324 [2021-07-09 17:33:18,512 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:18,512 INFO L82 PathProgramCache]: Analyzing trace with hash 222508706, now seen corresponding path program 452 times [2021-07-09 17:33:18,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:18,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813810205] [2021-07-09 17:33:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:18,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:18,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813810205] [2021-07-09 17:33:18,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813810205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:18,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903628229] [2021-07-09 17:33:18,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:18,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:18,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:18,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:18,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:18,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903628229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:18,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:18,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:18,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345292970] [2021-07-09 17:33:18,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:18,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:18,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:18,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:18,883 INFO L87 Difference]: Start difference. First operand 180 states and 387 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:19,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:19,121 INFO L93 Difference]: Finished difference Result 221 states and 453 transitions. [2021-07-09 17:33:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:19,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:19,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:19,122 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:33:19,122 INFO L226 Difference]: Without dead ends: 217 [2021-07-09 17:33:19,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-09 17:33:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 183. [2021-07-09 17:33:19,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.17032967032967) internal successors, (395), 182 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-07-09 17:33:19,124 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-07-09 17:33:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:19,124 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-07-09 17:33:19,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-07-09 17:33:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:19,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:19,124 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:19,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3329,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:19,337 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:19,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:19,338 INFO L82 PathProgramCache]: Analyzing trace with hash -20241694, now seen corresponding path program 453 times [2021-07-09 17:33:19,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:19,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064823143] [2021-07-09 17:33:19,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:19,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:19,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064823143] [2021-07-09 17:33:19,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064823143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:19,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447249081] [2021-07-09 17:33:19,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:19,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:33:19,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:19,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:33:19,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:19,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447249081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:19,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:19,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:19,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703043378] [2021-07-09 17:33:19,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:19,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:19,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:19,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:19,682 INFO L87 Difference]: Start difference. First operand 183 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:19,890 INFO L93 Difference]: Finished difference Result 195 states and 416 transitions. [2021-07-09 17:33:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:19,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:19,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:19,890 INFO L225 Difference]: With dead ends: 195 [2021-07-09 17:33:19,890 INFO L226 Difference]: Without dead ends: 195 [2021-07-09 17:33:19,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:33:19,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-07-09 17:33:19,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 178. [2021-07-09 17:33:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.15819209039548) internal successors, (382), 177 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 382 transitions. [2021-07-09 17:33:19,892 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 382 transitions. Word has length 19 [2021-07-09 17:33:19,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:19,892 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 382 transitions. [2021-07-09 17:33:19,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:19,892 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 382 transitions. [2021-07-09 17:33:19,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:19,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:19,893 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:20,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3336 [2021-07-09 17:33:20,093 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash -641291521, now seen corresponding path program 454 times [2021-07-09 17:33:20,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:20,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663977551] [2021-07-09 17:33:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:20,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:20,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663977551] [2021-07-09 17:33:20,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663977551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:20,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142359162] [2021-07-09 17:33:20,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:20,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:20,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:20,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:20,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142359162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:20,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:20,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:20,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309477701] [2021-07-09 17:33:20,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:20,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:20,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:20,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:20,458 INFO L87 Difference]: Start difference. First operand 178 states and 382 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:21,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:21,328 INFO L93 Difference]: Finished difference Result 290 states and 582 transitions. [2021-07-09 17:33:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:33:21,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:21,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:21,329 INFO L225 Difference]: With dead ends: 290 [2021-07-09 17:33:21,329 INFO L226 Difference]: Without dead ends: 290 [2021-07-09 17:33:21,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 891.2ms TimeCoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:33:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-07-09 17:33:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 183. [2021-07-09 17:33:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.17032967032967) internal successors, (395), 182 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-07-09 17:33:21,331 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-07-09 17:33:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:21,331 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-07-09 17:33:21,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:21,331 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-07-09 17:33:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:21,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:21,332 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:21,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3344,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:21,532 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:21,532 INFO L82 PathProgramCache]: Analyzing trace with hash -353741286, now seen corresponding path program 455 times [2021-07-09 17:33:21,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:21,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369772031] [2021-07-09 17:33:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:21,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:21,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369772031] [2021-07-09 17:33:21,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369772031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:21,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117689488] [2021-07-09 17:33:21,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:21,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:21,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:21,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:21,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:21,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117689488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:21,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:21,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:21,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871124839] [2021-07-09 17:33:21,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:21,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:21,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:21,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:21,837 INFO L87 Difference]: Start difference. First operand 183 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:22,271 INFO L93 Difference]: Finished difference Result 266 states and 543 transitions. [2021-07-09 17:33:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:33:22,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:22,272 INFO L225 Difference]: With dead ends: 266 [2021-07-09 17:33:22,272 INFO L226 Difference]: Without dead ends: 266 [2021-07-09 17:33:22,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:33:22,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-09 17:33:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 184. [2021-07-09 17:33:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.185792349726776) internal successors, (400), 183 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 400 transitions. [2021-07-09 17:33:22,274 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 400 transitions. Word has length 19 [2021-07-09 17:33:22,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:22,274 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 400 transitions. [2021-07-09 17:33:22,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:22,274 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 400 transitions. [2021-07-09 17:33:22,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:22,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:22,275 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:22,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3352 [2021-07-09 17:33:22,475 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:22,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1981190685, now seen corresponding path program 456 times [2021-07-09 17:33:22,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:22,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305483900] [2021-07-09 17:33:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:22,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:22,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305483900] [2021-07-09 17:33:22,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305483900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:22,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972427653] [2021-07-09 17:33:22,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:22,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:33:22,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:22,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:22,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:22,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972427653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:22,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:22,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:22,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158957149] [2021-07-09 17:33:22,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:22,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:22,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:22,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:22,841 INFO L87 Difference]: Start difference. First operand 184 states and 400 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:23,144 INFO L93 Difference]: Finished difference Result 203 states and 433 transitions. [2021-07-09 17:33:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:23,144 INFO L225 Difference]: With dead ends: 203 [2021-07-09 17:33:23,144 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:33:23,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 446.8ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:23,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:33:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2021-07-09 17:33:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.180327868852459) internal successors, (399), 183 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 399 transitions. [2021-07-09 17:33:23,146 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 399 transitions. Word has length 19 [2021-07-09 17:33:23,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:23,146 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 399 transitions. [2021-07-09 17:33:23,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:23,146 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 399 transitions. [2021-07-09 17:33:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:23,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:23,147 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:23,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3359 [2021-07-09 17:33:23,347 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:23,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:23,347 INFO L82 PathProgramCache]: Analyzing trace with hash -51751006, now seen corresponding path program 457 times [2021-07-09 17:33:23,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:23,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657469255] [2021-07-09 17:33:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:23,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:23,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657469255] [2021-07-09 17:33:23,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657469255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:23,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725149103] [2021-07-09 17:33:23,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:23,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:23,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:23,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725149103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:23,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:23,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:23,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613718400] [2021-07-09 17:33:23,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:23,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:23,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:23,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:23,651 INFO L87 Difference]: Start difference. First operand 184 states and 399 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:23,857 INFO L93 Difference]: Finished difference Result 210 states and 448 transitions. [2021-07-09 17:33:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:23,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:23,858 INFO L225 Difference]: With dead ends: 210 [2021-07-09 17:33:23,858 INFO L226 Difference]: Without dead ends: 210 [2021-07-09 17:33:23,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-09 17:33:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 181. [2021-07-09 17:33:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1666666666666665) internal successors, (390), 180 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-07-09 17:33:23,860 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-07-09 17:33:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:23,860 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-07-09 17:33:23,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-07-09 17:33:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:23,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:23,860 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:24,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:24,060 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:24,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:24,061 INFO L82 PathProgramCache]: Analyzing trace with hash -2124426459, now seen corresponding path program 458 times [2021-07-09 17:33:24,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:24,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9228181] [2021-07-09 17:33:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:24,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:24,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9228181] [2021-07-09 17:33:24,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9228181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:24,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009371530] [2021-07-09 17:33:24,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:24,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:24,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:24,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:24,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:24,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009371530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:24,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:24,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:24,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351086068] [2021-07-09 17:33:24,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:24,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:24,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:24,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:24,423 INFO L87 Difference]: Start difference. First operand 181 states and 390 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:24,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:24,613 INFO L93 Difference]: Finished difference Result 193 states and 414 transitions. [2021-07-09 17:33:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:24,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:24,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:24,614 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:33:24,614 INFO L226 Difference]: Without dead ends: 193 [2021-07-09 17:33:24,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 315.6ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:24,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-09 17:33:24,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 184. [2021-07-09 17:33:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1639344262295084) internal successors, (396), 183 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 396 transitions. [2021-07-09 17:33:24,616 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 396 transitions. Word has length 19 [2021-07-09 17:33:24,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:24,616 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 396 transitions. [2021-07-09 17:33:24,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:24,616 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 396 transitions. [2021-07-09 17:33:24,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:24,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:24,616 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:24,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3372,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:24,817 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:24,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1836876224, now seen corresponding path program 459 times [2021-07-09 17:33:24,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:24,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942605733] [2021-07-09 17:33:24,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:24,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:24,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942605733] [2021-07-09 17:33:24,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942605733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:24,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091946039] [2021-07-09 17:33:24,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:24,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:24,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:33:24,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:25,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091946039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:25,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:25,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:25,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059032044] [2021-07-09 17:33:25,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:25,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:25,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:25,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:25,125 INFO L87 Difference]: Start difference. First operand 184 states and 396 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:25,697 INFO L93 Difference]: Finished difference Result 276 states and 564 transitions. [2021-07-09 17:33:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:33:25,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:25,698 INFO L225 Difference]: With dead ends: 276 [2021-07-09 17:33:25,698 INFO L226 Difference]: Without dead ends: 276 [2021-07-09 17:33:25,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 573.8ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:25,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-07-09 17:33:25,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 186. [2021-07-09 17:33:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1837837837837837) internal successors, (404), 185 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:25,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 404 transitions. [2021-07-09 17:33:25,700 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 404 transitions. Word has length 19 [2021-07-09 17:33:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:25,700 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 404 transitions. [2021-07-09 17:33:25,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 404 transitions. [2021-07-09 17:33:25,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:25,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:25,701 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:25,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3380,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:25,901 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:25,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1534885944, now seen corresponding path program 460 times [2021-07-09 17:33:25,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:25,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963733879] [2021-07-09 17:33:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:25,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:25,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963733879] [2021-07-09 17:33:25,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963733879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:25,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184727614] [2021-07-09 17:33:25,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:26,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:26,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:26,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:26,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:26,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184727614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:26,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:26,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:26,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484800361] [2021-07-09 17:33:26,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:26,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:26,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:26,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:26,194 INFO L87 Difference]: Start difference. First operand 186 states and 404 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:26,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:26,523 INFO L93 Difference]: Finished difference Result 228 states and 486 transitions. [2021-07-09 17:33:26,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:26,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:26,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:26,524 INFO L225 Difference]: With dead ends: 228 [2021-07-09 17:33:26,524 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:33:26,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:26,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:33:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 185. [2021-07-09 17:33:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1847826086956523) internal successors, (402), 184 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 402 transitions. [2021-07-09 17:33:26,526 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 402 transitions. Word has length 19 [2021-07-09 17:33:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:26,526 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 402 transitions. [2021-07-09 17:33:26,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 402 transitions. [2021-07-09 17:33:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:26,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:26,526 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:26,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,461 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:26,727 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:26,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1028539678, now seen corresponding path program 461 times [2021-07-09 17:33:26,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:26,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322727915] [2021-07-09 17:33:26,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:26,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:26,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322727915] [2021-07-09 17:33:26,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322727915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:26,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051501658] [2021-07-09 17:33:26,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:26,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:26,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:26,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:33:26,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:27,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051501658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:27,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:27,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:27,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435420791] [2021-07-09 17:33:27,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:27,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:27,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:27,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:27,043 INFO L87 Difference]: Start difference. First operand 185 states and 402 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:27,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:27,212 INFO L93 Difference]: Finished difference Result 222 states and 472 transitions. [2021-07-09 17:33:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:33:27,212 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:27,212 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:33:27,212 INFO L226 Difference]: Without dead ends: 222 [2021-07-09 17:33:27,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-07-09 17:33:27,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 181. [2021-07-09 17:33:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1666666666666665) internal successors, (390), 180 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-07-09 17:33:27,214 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-07-09 17:33:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:27,214 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-07-09 17:33:27,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-07-09 17:33:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:27,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:27,215 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:27,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-07-09 17:33:27,415 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1307906685, now seen corresponding path program 462 times [2021-07-09 17:33:27,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:27,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165647909] [2021-07-09 17:33:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:27,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:27,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165647909] [2021-07-09 17:33:27,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165647909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:27,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756351773] [2021-07-09 17:33:27,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:27,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:33:27,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:27,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:27,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:27,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756351773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:27,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:27,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:27,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511071490] [2021-07-09 17:33:27,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:27,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:27,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:27,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:27,729 INFO L87 Difference]: Start difference. First operand 181 states and 390 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:28,098 INFO L93 Difference]: Finished difference Result 205 states and 438 transitions. [2021-07-09 17:33:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:33:28,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:28,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:28,099 INFO L225 Difference]: With dead ends: 205 [2021-07-09 17:33:28,099 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:33:28,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:28,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:33:28,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 181. [2021-07-09 17:33:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1666666666666665) internal successors, (390), 180 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-07-09 17:33:28,101 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-07-09 17:33:28,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:28,101 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-07-09 17:33:28,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,101 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-07-09 17:33:28,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:28,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:28,101 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:28,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3399,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:28,302 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:28,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:28,302 INFO L82 PathProgramCache]: Analyzing trace with hash -511170933, now seen corresponding path program 463 times [2021-07-09 17:33:28,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:28,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765238103] [2021-07-09 17:33:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:28,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:28,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765238103] [2021-07-09 17:33:28,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765238103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:28,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38274357] [2021-07-09 17:33:28,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:28,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:28,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:28,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38274357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:28,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:28,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:28,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114199176] [2021-07-09 17:33:28,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:28,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:28,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:28,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:28,610 INFO L87 Difference]: Start difference. First operand 181 states and 390 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:28,956 INFO L93 Difference]: Finished difference Result 221 states and 466 transitions. [2021-07-09 17:33:28,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:33:28,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:28,956 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:33:28,957 INFO L226 Difference]: Without dead ends: 218 [2021-07-09 17:33:28,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:28,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-07-09 17:33:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 181. [2021-07-09 17:33:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.161111111111111) internal successors, (389), 180 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 389 transitions. [2021-07-09 17:33:28,958 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 389 transitions. Word has length 19 [2021-07-09 17:33:28,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:28,959 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 389 transitions. [2021-07-09 17:33:28,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 389 transitions. [2021-07-09 17:33:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:28,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:28,959 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:29,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3404 [2021-07-09 17:33:29,159 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:29,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:29,160 INFO L82 PathProgramCache]: Analyzing trace with hash 616225160, now seen corresponding path program 464 times [2021-07-09 17:33:29,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:29,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939187484] [2021-07-09 17:33:29,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:29,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:29,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939187484] [2021-07-09 17:33:29,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939187484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:29,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396190433] [2021-07-09 17:33:29,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:29,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:29,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:29,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:29,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:29,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396190433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:29,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:29,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:29,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897730262] [2021-07-09 17:33:29,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:29,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:29,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:29,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:29,507 INFO L87 Difference]: Start difference. First operand 181 states and 389 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:29,729 INFO L93 Difference]: Finished difference Result 193 states and 412 transitions. [2021-07-09 17:33:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:29,730 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:29,730 INFO L225 Difference]: With dead ends: 193 [2021-07-09 17:33:29,730 INFO L226 Difference]: Without dead ends: 193 [2021-07-09 17:33:29,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:33:29,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-09 17:33:29,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2021-07-09 17:33:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.16) internal successors, (378), 175 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 378 transitions. [2021-07-09 17:33:29,732 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 378 transitions. Word has length 19 [2021-07-09 17:33:29,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:29,732 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 378 transitions. [2021-07-09 17:33:29,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 378 transitions. [2021-07-09 17:33:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:29,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:29,732 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:29,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3411,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:29,933 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:29,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1122571426, now seen corresponding path program 465 times [2021-07-09 17:33:29,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:29,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882109762] [2021-07-09 17:33:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:30,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:30,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882109762] [2021-07-09 17:33:30,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882109762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:30,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184442918] [2021-07-09 17:33:30,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:30,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:30,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:30,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:33:30,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:30,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184442918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:30,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:30,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:30,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756368026] [2021-07-09 17:33:30,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:30,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:30,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:30,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:30,253 INFO L87 Difference]: Start difference. First operand 176 states and 378 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:30,580 INFO L93 Difference]: Finished difference Result 244 states and 502 transitions. [2021-07-09 17:33:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:30,580 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:30,581 INFO L225 Difference]: With dead ends: 244 [2021-07-09 17:33:30,581 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 17:33:30,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 364.9ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 17:33:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 183. [2021-07-09 17:33:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.17032967032967) internal successors, (395), 182 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-07-09 17:33:30,583 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-07-09 17:33:30,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:30,583 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-07-09 17:33:30,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:30,583 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-07-09 17:33:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:30,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:30,583 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:30,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3419 [2021-07-09 17:33:30,784 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:30,784 INFO L82 PathProgramCache]: Analyzing trace with hash 584715848, now seen corresponding path program 466 times [2021-07-09 17:33:30,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:30,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122381006] [2021-07-09 17:33:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:30,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:30,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122381006] [2021-07-09 17:33:30,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122381006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:30,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698461504] [2021-07-09 17:33:30,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:30,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:30,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:30,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:30,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:31,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698461504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:31,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:31,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:31,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402354145] [2021-07-09 17:33:31,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:31,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:31,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:31,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:31,102 INFO L87 Difference]: Start difference. First operand 183 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:31,341 INFO L93 Difference]: Finished difference Result 209 states and 444 transitions. [2021-07-09 17:33:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:33:31,341 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:31,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:31,342 INFO L225 Difference]: With dead ends: 209 [2021-07-09 17:33:31,342 INFO L226 Difference]: Without dead ends: 209 [2021-07-09 17:33:31,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:31,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-07-09 17:33:31,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 175. [2021-07-09 17:33:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.160919540229885) internal successors, (376), 174 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 376 transitions. [2021-07-09 17:33:31,343 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 376 transitions. Word has length 19 [2021-07-09 17:33:31,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:31,344 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 376 transitions. [2021-07-09 17:33:31,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:31,344 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 376 transitions. [2021-07-09 17:33:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:31,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:31,344 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:31,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3426,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:31,544 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:31,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:31,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1695154842, now seen corresponding path program 467 times [2021-07-09 17:33:31,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:31,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201618611] [2021-07-09 17:33:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:31,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:31,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201618611] [2021-07-09 17:33:31,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201618611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:31,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110261470] [2021-07-09 17:33:31,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:31,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:33:31,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:31,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:31,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:31,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110261470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:31,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:31,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:31,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534589240] [2021-07-09 17:33:31,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:31,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:31,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:31,853 INFO L87 Difference]: Start difference. First operand 175 states and 376 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:32,254 INFO L93 Difference]: Finished difference Result 227 states and 473 transitions. [2021-07-09 17:33:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:32,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:32,255 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:33:32,255 INFO L226 Difference]: Without dead ends: 225 [2021-07-09 17:33:32,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 434.2ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:33:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-09 17:33:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 180. [2021-07-09 17:33:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1675977653631286) internal successors, (388), 179 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-07-09 17:33:32,257 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-07-09 17:33:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:32,257 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-07-09 17:33:32,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:32,257 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-07-09 17:33:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:32,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:32,257 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:32,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3431,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:32,458 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:32,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:32,458 INFO L82 PathProgramCache]: Analyzing trace with hash -360563512, now seen corresponding path program 468 times [2021-07-09 17:33:32,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:32,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531499359] [2021-07-09 17:33:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:32,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:32,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531499359] [2021-07-09 17:33:32,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531499359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:32,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404629997] [2021-07-09 17:33:32,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:32,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:32,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:32,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:32,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:32,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404629997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:32,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:32,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:32,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055325505] [2021-07-09 17:33:32,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:32,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:32,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:32,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:32,747 INFO L87 Difference]: Start difference. First operand 180 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:33,211 INFO L93 Difference]: Finished difference Result 240 states and 500 transitions. [2021-07-09 17:33:33,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:33:33,211 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:33,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:33,211 INFO L225 Difference]: With dead ends: 240 [2021-07-09 17:33:33,211 INFO L226 Difference]: Without dead ends: 240 [2021-07-09 17:33:33,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 498.4ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:33,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-09 17:33:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 180. [2021-07-09 17:33:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1675977653631286) internal successors, (388), 179 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-07-09 17:33:33,213 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-07-09 17:33:33,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:33,213 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-07-09 17:33:33,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-07-09 17:33:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:33,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:33,214 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:33,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3439,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:33,414 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:33,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:33,414 INFO L82 PathProgramCache]: Analyzing trace with hash -898419090, now seen corresponding path program 469 times [2021-07-09 17:33:33,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:33,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017045577] [2021-07-09 17:33:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:33,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:33,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017045577] [2021-07-09 17:33:33,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017045577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:33,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727419575] [2021-07-09 17:33:33,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:33,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:33,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:33,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727419575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:33,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:33,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:33,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283305223] [2021-07-09 17:33:33,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:33,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:33,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:33,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:33,717 INFO L87 Difference]: Start difference. First operand 180 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:34,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:34,064 INFO L93 Difference]: Finished difference Result 222 states and 470 transitions. [2021-07-09 17:33:34,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:34,064 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:34,064 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:33:34,064 INFO L226 Difference]: Without dead ends: 222 [2021-07-09 17:33:34,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-07-09 17:33:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 180. [2021-07-09 17:33:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1675977653631286) internal successors, (388), 179 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-07-09 17:33:34,066 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-07-09 17:33:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:34,066 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-07-09 17:33:34,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-07-09 17:33:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:34,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:34,067 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:34,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3446,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:34,267 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:34,268 INFO L82 PathProgramCache]: Analyzing trace with hash -392072824, now seen corresponding path program 470 times [2021-07-09 17:33:34,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:34,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837760647] [2021-07-09 17:33:34,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:34,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:34,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837760647] [2021-07-09 17:33:34,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837760647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:34,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985670958] [2021-07-09 17:33:34,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:34,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:34,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:34,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:34,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:34,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985670958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:34,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:34,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:34,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234709023] [2021-07-09 17:33:34,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:34,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:34,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:34,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:34,563 INFO L87 Difference]: Start difference. First operand 180 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:34,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:34,787 INFO L93 Difference]: Finished difference Result 215 states and 455 transitions. [2021-07-09 17:33:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:34,788 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:34,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:34,788 INFO L225 Difference]: With dead ends: 215 [2021-07-09 17:33:34,788 INFO L226 Difference]: Without dead ends: 215 [2021-07-09 17:33:34,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-07-09 17:33:34,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 175. [2021-07-09 17:33:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1551724137931036) internal successors, (375), 174 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-07-09 17:33:34,790 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-07-09 17:33:34,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:34,790 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-07-09 17:33:34,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-07-09 17:33:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:34,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:34,791 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:34,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3451 [2021-07-09 17:33:34,991 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:34,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:34,991 INFO L82 PathProgramCache]: Analyzing trace with hash -220502427, now seen corresponding path program 471 times [2021-07-09 17:33:34,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:34,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125147715] [2021-07-09 17:33:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:35,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:35,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125147715] [2021-07-09 17:33:35,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125147715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:35,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457107950] [2021-07-09 17:33:35,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:35,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:35,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:35,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:33:35,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:35,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457107950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:35,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:35,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:35,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205182277] [2021-07-09 17:33:35,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:35,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:35,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:35,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:35,380 INFO L87 Difference]: Start difference. First operand 175 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:35,919 INFO L93 Difference]: Finished difference Result 199 states and 419 transitions. [2021-07-09 17:33:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:35,920 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:35,920 INFO L225 Difference]: With dead ends: 199 [2021-07-09 17:33:35,920 INFO L226 Difference]: Without dead ends: 187 [2021-07-09 17:33:35,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 625.9ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:35,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-09 17:33:35,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 179. [2021-07-09 17:33:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.151685393258427) internal successors, (383), 178 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 383 transitions. [2021-07-09 17:33:35,922 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 383 transitions. Word has length 19 [2021-07-09 17:33:35,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:35,922 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 383 transitions. [2021-07-09 17:33:35,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 383 transitions. [2021-07-09 17:33:35,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:35,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:35,922 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:36,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3456,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:36,123 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:36,123 INFO L82 PathProgramCache]: Analyzing trace with hash 67047808, now seen corresponding path program 472 times [2021-07-09 17:33:36,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:36,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709171199] [2021-07-09 17:33:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:36,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:36,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709171199] [2021-07-09 17:33:36,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709171199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:36,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724032047] [2021-07-09 17:33:36,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:36,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:36,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:36,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:36,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:36,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724032047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:36,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:36,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:36,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259784691] [2021-07-09 17:33:36,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:36,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:36,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:36,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:36,429 INFO L87 Difference]: Start difference. First operand 179 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:37,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:37,220 INFO L93 Difference]: Finished difference Result 247 states and 509 transitions. [2021-07-09 17:33:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:33:37,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:37,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:37,220 INFO L225 Difference]: With dead ends: 247 [2021-07-09 17:33:37,220 INFO L226 Difference]: Without dead ends: 247 [2021-07-09 17:33:37,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 778.9ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:33:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-09 17:33:37,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 182. [2021-07-09 17:33:37,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.1767955801104972) internal successors, (394), 181 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:37,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 394 transitions. [2021-07-09 17:33:37,222 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 394 transitions. Word has length 19 [2021-07-09 17:33:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:37,223 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 394 transitions. [2021-07-09 17:33:37,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 394 transitions. [2021-07-09 17:33:37,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:37,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:37,223 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:37,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:37,423 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:37,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:37,424 INFO L82 PathProgramCache]: Analyzing trace with hash 369038088, now seen corresponding path program 473 times [2021-07-09 17:33:37,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:37,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639241618] [2021-07-09 17:33:37,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:37,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:37,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639241618] [2021-07-09 17:33:37,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639241618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:37,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214652471] [2021-07-09 17:33:37,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:37,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:37,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:37,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:33:37,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:37,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214652471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:37,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:37,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:37,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649642432] [2021-07-09 17:33:37,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:37,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:37,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:37,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:37,820 INFO L87 Difference]: Start difference. First operand 182 states and 394 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:38,426 INFO L93 Difference]: Finished difference Result 227 states and 481 transitions. [2021-07-09 17:33:38,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:33:38,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:38,427 INFO L225 Difference]: With dead ends: 227 [2021-07-09 17:33:38,427 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:33:38,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 668.3ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:33:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 181. [2021-07-09 17:33:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1777777777777776) internal successors, (392), 180 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 392 transitions. [2021-07-09 17:33:38,429 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 392 transitions. Word has length 19 [2021-07-09 17:33:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:38,429 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 392 transitions. [2021-07-09 17:33:38,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 392 transitions. [2021-07-09 17:33:38,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:38,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:38,429 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:38,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3471 [2021-07-09 17:33:38,630 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:38,630 INFO L82 PathProgramCache]: Analyzing trace with hash 875384354, now seen corresponding path program 474 times [2021-07-09 17:33:38,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:38,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178526376] [2021-07-09 17:33:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:38,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:38,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178526376] [2021-07-09 17:33:38,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178526376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:38,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332955347] [2021-07-09 17:33:38,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:38,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:33:38,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:38,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:38,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332955347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:38,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:38,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:38,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580680468] [2021-07-09 17:33:38,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:38,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:38,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:38,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:38,936 INFO L87 Difference]: Start difference. First operand 181 states and 392 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:39,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:39,414 INFO L93 Difference]: Finished difference Result 224 states and 476 transitions. [2021-07-09 17:33:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:39,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:39,415 INFO L225 Difference]: With dead ends: 224 [2021-07-09 17:33:39,415 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:33:39,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 555.8ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:33:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:33:39,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 180. [2021-07-09 17:33:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.17877094972067) internal successors, (390), 179 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 390 transitions. [2021-07-09 17:33:39,417 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 390 transitions. Word has length 19 [2021-07-09 17:33:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:39,417 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 390 transitions. [2021-07-09 17:33:39,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:39,417 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 390 transitions. [2021-07-09 17:33:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:39,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:39,417 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:39,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3478,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:39,618 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:39,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:39,618 INFO L82 PathProgramCache]: Analyzing trace with hash -607750584, now seen corresponding path program 475 times [2021-07-09 17:33:39,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:39,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262003453] [2021-07-09 17:33:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:39,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:39,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262003453] [2021-07-09 17:33:39,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262003453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:39,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28608391] [2021-07-09 17:33:39,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:39,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:39,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:39,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28608391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:39,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:39,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:39,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865512549] [2021-07-09 17:33:39,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:39,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:39,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:39,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:39,909 INFO L87 Difference]: Start difference. First operand 180 states and 390 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:40,182 INFO L93 Difference]: Finished difference Result 204 states and 433 transitions. [2021-07-09 17:33:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:40,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:40,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:40,182 INFO L225 Difference]: With dead ends: 204 [2021-07-09 17:33:40,182 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:33:40,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 349.5ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:40,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:33:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 175. [2021-07-09 17:33:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1551724137931036) internal successors, (375), 174 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-07-09 17:33:40,184 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-07-09 17:33:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:40,185 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-07-09 17:33:40,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-07-09 17:33:40,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:40,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:40,185 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:40,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3483 [2021-07-09 17:33:40,385 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:40,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:40,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1039160257, now seen corresponding path program 476 times [2021-07-09 17:33:40,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:40,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803285662] [2021-07-09 17:33:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:40,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:40,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803285662] [2021-07-09 17:33:40,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803285662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:40,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074492950] [2021-07-09 17:33:40,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:40,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:40,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:40,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:33:40,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:40,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074492950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:40,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:40,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:40,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097557661] [2021-07-09 17:33:40,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:40,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:40,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:40,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:40,744 INFO L87 Difference]: Start difference. First operand 175 states and 375 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:41,121 INFO L93 Difference]: Finished difference Result 211 states and 445 transitions. [2021-07-09 17:33:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:33:41,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:41,122 INFO L225 Difference]: With dead ends: 211 [2021-07-09 17:33:41,122 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:33:41,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 460.0ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:41,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:33:41,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 175. [2021-07-09 17:33:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1551724137931036) internal successors, (375), 174 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-07-09 17:33:41,124 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-07-09 17:33:41,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:41,124 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-07-09 17:33:41,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:41,124 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-07-09 17:33:41,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:41,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:41,124 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:41,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3488,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:41,324 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:41,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:41,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1127721988, now seen corresponding path program 477 times [2021-07-09 17:33:41,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:41,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980507058] [2021-07-09 17:33:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:41,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:41,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980507058] [2021-07-09 17:33:41,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980507058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:41,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193488529] [2021-07-09 17:33:41,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:41,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:33:41,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:41,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:41,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:41,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193488529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:41,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:41,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:41,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632524225] [2021-07-09 17:33:41,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:41,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:41,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:41,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:41,678 INFO L87 Difference]: Start difference. First operand 175 states and 375 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:42,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:42,117 INFO L93 Difference]: Finished difference Result 213 states and 439 transitions. [2021-07-09 17:33:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:33:42,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:42,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:42,118 INFO L225 Difference]: With dead ends: 213 [2021-07-09 17:33:42,118 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:33:42,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 481.3ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:33:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:33:42,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 175. [2021-07-09 17:33:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.132183908045977) internal successors, (371), 174 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:42,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 371 transitions. [2021-07-09 17:33:42,120 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 371 transitions. Word has length 19 [2021-07-09 17:33:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:42,120 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 371 transitions. [2021-07-09 17:33:42,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:42,120 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 371 transitions. [2021-07-09 17:33:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:42,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:42,120 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:42,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3492 [2021-07-09 17:33:42,321 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:42,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:42,321 INFO L82 PathProgramCache]: Analyzing trace with hash -242424505, now seen corresponding path program 478 times [2021-07-09 17:33:42,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:42,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943132810] [2021-07-09 17:33:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:42,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:42,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943132810] [2021-07-09 17:33:42,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943132810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:42,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590723086] [2021-07-09 17:33:42,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:42,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:42,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:42,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:42,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:42,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590723086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:42,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:42,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:42,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568009372] [2021-07-09 17:33:42,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:42,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:42,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:42,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:42,635 INFO L87 Difference]: Start difference. First operand 175 states and 371 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:43,091 INFO L93 Difference]: Finished difference Result 220 states and 456 transitions. [2021-07-09 17:33:43,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:33:43,092 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:43,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:43,092 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:33:43,092 INFO L226 Difference]: Without dead ends: 217 [2021-07-09 17:33:43,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 475.0ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:43,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-09 17:33:43,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2021-07-09 17:33:43,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1264367816091956) internal successors, (370), 174 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 370 transitions. [2021-07-09 17:33:43,094 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 370 transitions. Word has length 19 [2021-07-09 17:33:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:43,094 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 370 transitions. [2021-07-09 17:33:43,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 370 transitions. [2021-07-09 17:33:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:43,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:43,094 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:43,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3499,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:43,295 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:43,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:43,295 INFO L82 PathProgramCache]: Analyzing trace with hash 884971588, now seen corresponding path program 479 times [2021-07-09 17:33:43,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:43,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966211711] [2021-07-09 17:33:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:43,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:43,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966211711] [2021-07-09 17:33:43,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966211711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:43,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244185703] [2021-07-09 17:33:43,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:43,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:43,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:43,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:43,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:43,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244185703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:43,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:43,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:43,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302568030] [2021-07-09 17:33:43,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:43,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:43,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:43,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:43,643 INFO L87 Difference]: Start difference. First operand 175 states and 370 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:43,938 INFO L93 Difference]: Finished difference Result 196 states and 410 transitions. [2021-07-09 17:33:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:43,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:43,939 INFO L225 Difference]: With dead ends: 196 [2021-07-09 17:33:43,939 INFO L226 Difference]: Without dead ends: 196 [2021-07-09 17:33:43,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:43,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-07-09 17:33:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 170. [2021-07-09 17:33:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1242603550295858) internal successors, (359), 169 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 359 transitions. [2021-07-09 17:33:43,941 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 359 transitions. Word has length 19 [2021-07-09 17:33:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:43,941 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 359 transitions. [2021-07-09 17:33:43,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 359 transitions. [2021-07-09 17:33:43,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:43,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:43,941 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:44,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3506 [2021-07-09 17:33:44,142 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:44,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1391317854, now seen corresponding path program 480 times [2021-07-09 17:33:44,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:44,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256251639] [2021-07-09 17:33:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:44,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:44,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256251639] [2021-07-09 17:33:44,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256251639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:44,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976040468] [2021-07-09 17:33:44,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:44,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:44,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:44,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:44,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:44,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976040468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:44,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:44,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:44,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935890648] [2021-07-09 17:33:44,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:44,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:44,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:44,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:44,455 INFO L87 Difference]: Start difference. First operand 170 states and 359 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:44,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:44,803 INFO L93 Difference]: Finished difference Result 242 states and 497 transitions. [2021-07-09 17:33:44,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:33:44,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:44,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:44,804 INFO L225 Difference]: With dead ends: 242 [2021-07-09 17:33:44,804 INFO L226 Difference]: Without dead ends: 242 [2021-07-09 17:33:44,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 378.5ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:44,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-09 17:33:44,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 174. [2021-07-09 17:33:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.132947976878613) internal successors, (369), 173 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 369 transitions. [2021-07-09 17:33:44,806 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 369 transitions. Word has length 19 [2021-07-09 17:33:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:44,806 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 369 transitions. [2021-07-09 17:33:44,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 369 transitions. [2021-07-09 17:33:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:44,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:44,806 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:45,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3514,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:45,007 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:45,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:45,007 INFO L82 PathProgramCache]: Analyzing trace with hash 853462276, now seen corresponding path program 481 times [2021-07-09 17:33:45,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:45,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320380963] [2021-07-09 17:33:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:45,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:45,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320380963] [2021-07-09 17:33:45,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320380963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:45,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333508312] [2021-07-09 17:33:45,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:45,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:45,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:45,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333508312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:45,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:45,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:45,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813500997] [2021-07-09 17:33:45,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:45,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:45,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:45,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:45,317 INFO L87 Difference]: Start difference. First operand 174 states and 369 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:45,711 INFO L93 Difference]: Finished difference Result 210 states and 438 transitions. [2021-07-09 17:33:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:33:45,711 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:45,711 INFO L225 Difference]: With dead ends: 210 [2021-07-09 17:33:45,711 INFO L226 Difference]: Without dead ends: 210 [2021-07-09 17:33:45,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:33:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-09 17:33:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 170. [2021-07-09 17:33:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1242603550295858) internal successors, (359), 169 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 359 transitions. [2021-07-09 17:33:45,713 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 359 transitions. Word has length 19 [2021-07-09 17:33:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:45,713 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 359 transitions. [2021-07-09 17:33:45,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:45,713 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 359 transitions. [2021-07-09 17:33:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:45,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:45,714 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:45,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:45,914 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:45,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:45,914 INFO L82 PathProgramCache]: Analyzing trace with hash -91817084, now seen corresponding path program 482 times [2021-07-09 17:33:45,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:45,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632790460] [2021-07-09 17:33:45,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:46,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:46,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632790460] [2021-07-09 17:33:46,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632790460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:46,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322743671] [2021-07-09 17:33:46,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:46,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:46,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:46,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:46,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:46,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322743671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:46,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:46,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:46,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952009932] [2021-07-09 17:33:46,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:46,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:46,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:46,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:46,205 INFO L87 Difference]: Start difference. First operand 170 states and 359 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:46,718 INFO L93 Difference]: Finished difference Result 251 states and 508 transitions. [2021-07-09 17:33:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:33:46,718 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:46,719 INFO L225 Difference]: With dead ends: 251 [2021-07-09 17:33:46,719 INFO L226 Difference]: Without dead ends: 251 [2021-07-09 17:33:46,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 506.9ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-09 17:33:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 176. [2021-07-09 17:33:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.142857142857143) internal successors, (375), 175 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 375 transitions. [2021-07-09 17:33:46,721 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 375 transitions. Word has length 19 [2021-07-09 17:33:46,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:46,721 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 375 transitions. [2021-07-09 17:33:46,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:46,721 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 375 transitions. [2021-07-09 17:33:46,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:46,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:46,721 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:46,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3526,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:46,922 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:46,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:46,922 INFO L82 PathProgramCache]: Analyzing trace with hash -629672662, now seen corresponding path program 483 times [2021-07-09 17:33:46,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:46,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024497002] [2021-07-09 17:33:46,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:47,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:47,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024497002] [2021-07-09 17:33:47,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024497002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:47,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818393662] [2021-07-09 17:33:47,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:47,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:47,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:47,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:47,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:47,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818393662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:47,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:47,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:47,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939171731] [2021-07-09 17:33:47,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:47,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:47,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:47,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:47,215 INFO L87 Difference]: Start difference. First operand 176 states and 375 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:47,591 INFO L93 Difference]: Finished difference Result 230 states and 480 transitions. [2021-07-09 17:33:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:33:47,591 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:47,592 INFO L225 Difference]: With dead ends: 230 [2021-07-09 17:33:47,592 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 17:33:47,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:33:47,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 17:33:47,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 175. [2021-07-09 17:33:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1436781609195403) internal successors, (373), 174 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 373 transitions. [2021-07-09 17:33:47,594 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 373 transitions. Word has length 19 [2021-07-09 17:33:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:47,594 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 373 transitions. [2021-07-09 17:33:47,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:47,594 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 373 transitions. [2021-07-09 17:33:47,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:47,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:47,594 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:47,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3533,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:47,795 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:47,795 INFO L82 PathProgramCache]: Analyzing trace with hash -123326396, now seen corresponding path program 484 times [2021-07-09 17:33:47,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:47,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937560060] [2021-07-09 17:33:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:47,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:47,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937560060] [2021-07-09 17:33:47,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937560060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:47,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535923686] [2021-07-09 17:33:47,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:47,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:47,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:47,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:48,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535923686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:48,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:48,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:33:48,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487405242] [2021-07-09 17:33:48,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:33:48,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:48,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:33:48,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:48,079 INFO L87 Difference]: Start difference. First operand 175 states and 373 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:48,356 INFO L93 Difference]: Finished difference Result 213 states and 444 transitions. [2021-07-09 17:33:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:48,357 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:48,357 INFO L225 Difference]: With dead ends: 213 [2021-07-09 17:33:48,357 INFO L226 Difference]: Without dead ends: 213 [2021-07-09 17:33:48,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 311.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:33:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-09 17:33:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-07-09 17:33:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1265060240963853) internal successors, (353), 166 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 353 transitions. [2021-07-09 17:33:48,362 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 353 transitions. Word has length 19 [2021-07-09 17:33:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:48,362 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 353 transitions. [2021-07-09 17:33:48,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 353 transitions. [2021-07-09 17:33:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:48,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:48,362 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:48,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3538,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:48,563 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:48,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:48,563 INFO L82 PathProgramCache]: Analyzing trace with hash 48244001, now seen corresponding path program 485 times [2021-07-09 17:33:48,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:48,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57462976] [2021-07-09 17:33:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:48,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:48,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57462976] [2021-07-09 17:33:48,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57462976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:48,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624897204] [2021-07-09 17:33:48,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:48,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:48,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:48,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:48,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:48,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624897204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:48,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:48,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:48,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807562929] [2021-07-09 17:33:48,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:48,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:48,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:48,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:48,936 INFO L87 Difference]: Start difference. First operand 167 states and 353 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:49,406 INFO L93 Difference]: Finished difference Result 185 states and 381 transitions. [2021-07-09 17:33:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:33:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:49,407 INFO L225 Difference]: With dead ends: 185 [2021-07-09 17:33:49,407 INFO L226 Difference]: Without dead ends: 173 [2021-07-09 17:33:49,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 578.0ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:33:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-09 17:33:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2021-07-09 17:33:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1077844311377247) internal successors, (352), 167 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 352 transitions. [2021-07-09 17:33:49,409 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 352 transitions. Word has length 19 [2021-07-09 17:33:49,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:49,409 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 352 transitions. [2021-07-09 17:33:49,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:49,409 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 352 transitions. [2021-07-09 17:33:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:49,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:49,409 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:49,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:49,609 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:49,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:49,610 INFO L82 PathProgramCache]: Analyzing trace with hash 335794236, now seen corresponding path program 486 times [2021-07-09 17:33:49,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:49,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504345621] [2021-07-09 17:33:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:49,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:49,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504345621] [2021-07-09 17:33:49,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504345621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:49,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668388390] [2021-07-09 17:33:49,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:49,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:49,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:49,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:49,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:49,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668388390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:49,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:49,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:49,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691118871] [2021-07-09 17:33:49,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:49,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:49,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:49,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:49,918 INFO L87 Difference]: Start difference. First operand 168 states and 352 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:50,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:50,635 INFO L93 Difference]: Finished difference Result 231 states and 460 transitions. [2021-07-09 17:33:50,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:33:50,635 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:50,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:50,635 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:33:50,635 INFO L226 Difference]: Without dead ends: 231 [2021-07-09 17:33:50,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 676.1ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:33:50,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-09 17:33:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 173. [2021-07-09 17:33:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.13953488372093) internal successors, (368), 172 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 368 transitions. [2021-07-09 17:33:50,637 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 368 transitions. Word has length 19 [2021-07-09 17:33:50,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:50,637 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 368 transitions. [2021-07-09 17:33:50,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 368 transitions. [2021-07-09 17:33:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:50,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:50,638 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:50,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-07-09 17:33:50,838 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:50,838 INFO L82 PathProgramCache]: Analyzing trace with hash 637784516, now seen corresponding path program 487 times [2021-07-09 17:33:50,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:50,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085998241] [2021-07-09 17:33:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:50,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:50,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085998241] [2021-07-09 17:33:50,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085998241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:50,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088629093] [2021-07-09 17:33:50,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:50,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:50,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:51,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088629093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:51,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:51,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:51,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994814641] [2021-07-09 17:33:51,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:51,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:51,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:51,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:51,145 INFO L87 Difference]: Start difference. First operand 173 states and 368 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:51,496 INFO L93 Difference]: Finished difference Result 205 states and 428 transitions. [2021-07-09 17:33:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:51,496 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:51,496 INFO L225 Difference]: With dead ends: 205 [2021-07-09 17:33:51,496 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:33:51,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 395.0ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:51,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:33:51,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 172. [2021-07-09 17:33:51,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1403508771929824) internal successors, (366), 171 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 366 transitions. [2021-07-09 17:33:51,498 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 366 transitions. Word has length 19 [2021-07-09 17:33:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:51,498 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 366 transitions. [2021-07-09 17:33:51,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 366 transitions. [2021-07-09 17:33:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:51,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:51,499 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:51,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3558 [2021-07-09 17:33:51,699 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:51,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:51,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1144130782, now seen corresponding path program 488 times [2021-07-09 17:33:51,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:51,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624385705] [2021-07-09 17:33:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:51,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:51,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624385705] [2021-07-09 17:33:51,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624385705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:51,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271020895] [2021-07-09 17:33:51,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:51,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:51,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:51,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:51,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:51,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271020895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:51,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:51,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:51,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428398454] [2021-07-09 17:33:51,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:51,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:51,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:51,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:51,998 INFO L87 Difference]: Start difference. First operand 172 states and 366 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:52,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:52,334 INFO L93 Difference]: Finished difference Result 217 states and 453 transitions. [2021-07-09 17:33:52,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:33:52,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:52,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:52,334 INFO L225 Difference]: With dead ends: 217 [2021-07-09 17:33:52,334 INFO L226 Difference]: Without dead ends: 217 [2021-07-09 17:33:52,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:52,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-09 17:33:52,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 171. [2021-07-09 17:33:52,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1411764705882352) internal successors, (364), 170 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 364 transitions. [2021-07-09 17:33:52,336 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 364 transitions. Word has length 19 [2021-07-09 17:33:52,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:52,337 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 364 transitions. [2021-07-09 17:33:52,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:52,337 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 364 transitions. [2021-07-09 17:33:52,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:52,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:52,337 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:52,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3563,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:52,537 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:52,538 INFO L82 PathProgramCache]: Analyzing trace with hash -339004156, now seen corresponding path program 489 times [2021-07-09 17:33:52,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:52,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062616002] [2021-07-09 17:33:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:52,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:52,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062616002] [2021-07-09 17:33:52,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062616002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:52,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514897860] [2021-07-09 17:33:52,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:52,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:52,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:52,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:52,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:52,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514897860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:52,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:52,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:52,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889202701] [2021-07-09 17:33:52,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:52,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:52,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:52,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:52,829 INFO L87 Difference]: Start difference. First operand 171 states and 364 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:53,174 INFO L93 Difference]: Finished difference Result 200 states and 415 transitions. [2021-07-09 17:33:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:33:53,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:53,174 INFO L225 Difference]: With dead ends: 200 [2021-07-09 17:33:53,175 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:33:53,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 380.4ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:33:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:33:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 164. [2021-07-09 17:33:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1104294478527605) internal successors, (344), 163 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:53,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 344 transitions. [2021-07-09 17:33:53,176 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 344 transitions. Word has length 19 [2021-07-09 17:33:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:53,176 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 344 transitions. [2021-07-09 17:33:53,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:53,177 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 344 transitions. [2021-07-09 17:33:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:53,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:53,177 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:53,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3568 [2021-07-09 17:33:53,377 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:53,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:53,377 INFO L82 PathProgramCache]: Analyzing trace with hash 472555237, now seen corresponding path program 490 times [2021-07-09 17:33:53,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:53,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647129031] [2021-07-09 17:33:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:53,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:53,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647129031] [2021-07-09 17:33:53,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647129031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:53,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036922852] [2021-07-09 17:33:53,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:53,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:53,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:53,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:53,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:53,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036922852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:53,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:53,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:53,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344420796] [2021-07-09 17:33:53,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:53,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:53,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:53,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:53,758 INFO L87 Difference]: Start difference. First operand 164 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:54,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:54,262 INFO L93 Difference]: Finished difference Result 195 states and 398 transitions. [2021-07-09 17:33:54,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:33:54,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:54,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:54,262 INFO L225 Difference]: With dead ends: 195 [2021-07-09 17:33:54,262 INFO L226 Difference]: Without dead ends: 195 [2021-07-09 17:33:54,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 649.0ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:33:54,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-07-09 17:33:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 164. [2021-07-09 17:33:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1104294478527605) internal successors, (344), 163 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:54,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 344 transitions. [2021-07-09 17:33:54,264 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 344 transitions. Word has length 19 [2021-07-09 17:33:54,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:54,264 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 344 transitions. [2021-07-09 17:33:54,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 344 transitions. [2021-07-09 17:33:54,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:54,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:54,265 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:54,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3573,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:54,465 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:54,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:54,465 INFO L82 PathProgramCache]: Analyzing trace with hash 760105472, now seen corresponding path program 491 times [2021-07-09 17:33:54,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:54,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250310303] [2021-07-09 17:33:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:54,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:54,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250310303] [2021-07-09 17:33:54,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250310303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:54,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005405550] [2021-07-09 17:33:54,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:54,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:33:54,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:54,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:54,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:54,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005405550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:54,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:54,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:54,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257091080] [2021-07-09 17:33:54,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:54,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:54,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:54,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:54,776 INFO L87 Difference]: Start difference. First operand 164 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:55,463 INFO L93 Difference]: Finished difference Result 228 states and 458 transitions. [2021-07-09 17:33:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:33:55,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:55,464 INFO L225 Difference]: With dead ends: 228 [2021-07-09 17:33:55,464 INFO L226 Difference]: Without dead ends: 228 [2021-07-09 17:33:55,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 669.6ms TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:33:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-09 17:33:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 168. [2021-07-09 17:33:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1197604790419162) internal successors, (354), 167 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 354 transitions. [2021-07-09 17:33:55,466 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 354 transitions. Word has length 19 [2021-07-09 17:33:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:55,466 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 354 transitions. [2021-07-09 17:33:55,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 354 transitions. [2021-07-09 17:33:55,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:55,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:55,466 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:55,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3581 [2021-07-09 17:33:55,667 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:55,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:55,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1062095752, now seen corresponding path program 492 times [2021-07-09 17:33:55,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:55,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469234323] [2021-07-09 17:33:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:55,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:55,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469234323] [2021-07-09 17:33:55,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469234323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:55,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769773571] [2021-07-09 17:33:55,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:55,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:33:55,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:55,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:55,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:55,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769773571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:55,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:55,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:55,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562412685] [2021-07-09 17:33:55,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:55,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:55,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:55,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:55,971 INFO L87 Difference]: Start difference. First operand 168 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:56,560 INFO L93 Difference]: Finished difference Result 226 states and 459 transitions. [2021-07-09 17:33:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:56,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:56,561 INFO L225 Difference]: With dead ends: 226 [2021-07-09 17:33:56,561 INFO L226 Difference]: Without dead ends: 226 [2021-07-09 17:33:56,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 619.8ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:33:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-09 17:33:56,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 167. [2021-07-09 17:33:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1204819277108435) internal successors, (352), 166 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 352 transitions. [2021-07-09 17:33:56,563 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 352 transitions. Word has length 19 [2021-07-09 17:33:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:56,563 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 352 transitions. [2021-07-09 17:33:56,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:56,563 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 352 transitions. [2021-07-09 17:33:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:56,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:56,563 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:56,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:56,764 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:56,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:56,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1568442018, now seen corresponding path program 493 times [2021-07-09 17:33:56,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:56,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054448760] [2021-07-09 17:33:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:56,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:56,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054448760] [2021-07-09 17:33:56,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054448760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:56,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397918586] [2021-07-09 17:33:56,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:56,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:56,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:57,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397918586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:57,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:57,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:57,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200670544] [2021-07-09 17:33:57,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:57,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:57,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:57,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:57,066 INFO L87 Difference]: Start difference. First operand 167 states and 352 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:57,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:57,670 INFO L93 Difference]: Finished difference Result 238 states and 484 transitions. [2021-07-09 17:33:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:57,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:57,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:57,671 INFO L225 Difference]: With dead ends: 238 [2021-07-09 17:33:57,671 INFO L226 Difference]: Without dead ends: 238 [2021-07-09 17:33:57,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 629.2ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:33:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-09 17:33:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 166. [2021-07-09 17:33:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.121212121212121) internal successors, (350), 165 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 350 transitions. [2021-07-09 17:33:57,673 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 350 transitions. Word has length 19 [2021-07-09 17:33:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:57,673 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 350 transitions. [2021-07-09 17:33:57,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 350 transitions. [2021-07-09 17:33:57,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:57,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:57,673 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:57,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3593 [2021-07-09 17:33:57,874 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:57,874 INFO L82 PathProgramCache]: Analyzing trace with hash 85307080, now seen corresponding path program 494 times [2021-07-09 17:33:57,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:57,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233719031] [2021-07-09 17:33:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:57,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:57,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233719031] [2021-07-09 17:33:57,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233719031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:57,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60812714] [2021-07-09 17:33:57,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:57,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:57,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:57,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:33:57,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:58,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60812714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:58,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:58,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:33:58,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651162969] [2021-07-09 17:33:58,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:33:58,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:58,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:33:58,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:33:58,166 INFO L87 Difference]: Start difference. First operand 166 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:58,751 INFO L93 Difference]: Finished difference Result 250 states and 509 transitions. [2021-07-09 17:33:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:33:58,751 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:58,752 INFO L225 Difference]: With dead ends: 250 [2021-07-09 17:33:58,752 INFO L226 Difference]: Without dead ends: 250 [2021-07-09 17:33:58,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 585.6ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:33:58,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-09 17:33:58,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 165. [2021-07-09 17:33:58,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1219512195121952) internal successors, (348), 164 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:58,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 348 transitions. [2021-07-09 17:33:58,754 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 348 transitions. Word has length 19 [2021-07-09 17:33:58,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:58,754 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 348 transitions. [2021-07-09 17:33:58,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:58,754 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 348 transitions. [2021-07-09 17:33:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:33:58,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:58,754 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:58,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:58,955 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:58,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:58,955 INFO L82 PathProgramCache]: Analyzing trace with hash 930278532, now seen corresponding path program 495 times [2021-07-09 17:33:58,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:58,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149757461] [2021-07-09 17:33:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:59,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:59,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149757461] [2021-07-09 17:33:59,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149757461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:59,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904472545] [2021-07-09 17:33:59,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:59,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:33:59,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:59,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:33:59,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:59,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904472545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:59,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:59,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 17:33:59,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865807885] [2021-07-09 17:33:59,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:33:59,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:59,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:33:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:33:59,191 INFO L87 Difference]: Start difference. First operand 165 states and 348 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:59,334 INFO L93 Difference]: Finished difference Result 219 states and 444 transitions. [2021-07-09 17:33:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:33:59,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:33:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:59,335 INFO L225 Difference]: With dead ends: 219 [2021-07-09 17:33:59,335 INFO L226 Difference]: Without dead ends: 219 [2021-07-09 17:33:59,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:33:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-09 17:33:59,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 159. [2021-07-09 17:33:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1012658227848102) internal successors, (332), 158 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 332 transitions. [2021-07-09 17:33:59,337 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 332 transitions. Word has length 19 [2021-07-09 17:33:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:59,337 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 332 transitions. [2021-07-09 17:33:59,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:59,337 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 332 transitions. [2021-07-09 17:33:59,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:33:59,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:59,337 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:59,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3603,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:59,538 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:59,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:59,538 INFO L82 PathProgramCache]: Analyzing trace with hash 313289047, now seen corresponding path program 496 times [2021-07-09 17:33:59,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:59,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134849589] [2021-07-09 17:33:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:59,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:59,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134849589] [2021-07-09 17:33:59,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134849589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:59,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046255597] [2021-07-09 17:33:59,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:59,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:59,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:59,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:33:59,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:00,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046255597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:00,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:00,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:34:00,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252705834] [2021-07-09 17:34:00,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:34:00,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:00,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:34:00,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:00,248 INFO L87 Difference]: Start difference. First operand 159 states and 332 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:00,755 INFO L93 Difference]: Finished difference Result 250 states and 493 transitions. [2021-07-09 17:34:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:00,756 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:00,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:00,756 INFO L225 Difference]: With dead ends: 250 [2021-07-09 17:34:00,756 INFO L226 Difference]: Without dead ends: 231 [2021-07-09 17:34:00,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 902.7ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:34:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-09 17:34:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2021-07-09 17:34:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.10062893081761) internal successors, (334), 159 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 334 transitions. [2021-07-09 17:34:00,758 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 334 transitions. Word has length 20 [2021-07-09 17:34:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:00,758 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 334 transitions. [2021-07-09 17:34:00,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 334 transitions. [2021-07-09 17:34:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:00,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:00,758 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:00,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-07-09 17:34:00,959 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:00,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:00,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2044100551, now seen corresponding path program 497 times [2021-07-09 17:34:00,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:00,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993818819] [2021-07-09 17:34:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:01,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:01,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993818819] [2021-07-09 17:34:01,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993818819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:01,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277455532] [2021-07-09 17:34:01,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:01,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:34:01,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:01,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:34:01,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:01,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277455532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:01,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:01,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:34:01,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163681789] [2021-07-09 17:34:01,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:34:01,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:01,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:34:01,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:01,627 INFO L87 Difference]: Start difference. First operand 160 states and 334 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:02,904 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-07-09 17:34:03,200 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 74 [2021-07-09 17:34:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:03,254 INFO L93 Difference]: Finished difference Result 282 states and 567 transitions. [2021-07-09 17:34:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:34:03,254 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:03,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:03,255 INFO L225 Difference]: With dead ends: 282 [2021-07-09 17:34:03,255 INFO L226 Difference]: Without dead ends: 258 [2021-07-09 17:34:03,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1772.8ms TimeCoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:34:03,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-09 17:34:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 164. [2021-07-09 17:34:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1165644171779143) internal successors, (345), 163 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 345 transitions. [2021-07-09 17:34:03,257 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 345 transitions. Word has length 20 [2021-07-09 17:34:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:03,257 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 345 transitions. [2021-07-09 17:34:03,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:03,257 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 345 transitions. [2021-07-09 17:34:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:03,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:03,257 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:03,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:03,457 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:03,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:03,458 INFO L82 PathProgramCache]: Analyzing trace with hash -983322461, now seen corresponding path program 498 times [2021-07-09 17:34:03,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:03,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696564891] [2021-07-09 17:34:03,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:03,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:03,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696564891] [2021-07-09 17:34:03,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696564891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:03,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229235581] [2021-07-09 17:34:03,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:03,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:34:03,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:34:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:04,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229235581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:04,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:04,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:04,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895070484] [2021-07-09 17:34:04,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:04,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:04,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:04,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:04,135 INFO L87 Difference]: Start difference. First operand 164 states and 345 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:04,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:04,969 INFO L93 Difference]: Finished difference Result 214 states and 421 transitions. [2021-07-09 17:34:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:34:04,969 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:04,970 INFO L225 Difference]: With dead ends: 214 [2021-07-09 17:34:04,970 INFO L226 Difference]: Without dead ends: 197 [2021-07-09 17:34:04,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1106.9ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:34:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-09 17:34:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 166. [2021-07-09 17:34:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.1151515151515152) internal successors, (349), 165 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 349 transitions. [2021-07-09 17:34:04,972 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 349 transitions. Word has length 20 [2021-07-09 17:34:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:04,972 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 349 transitions. [2021-07-09 17:34:04,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 349 transitions. [2021-07-09 17:34:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:04,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:04,972 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:05,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:05,172 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:05,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:05,173 INFO L82 PathProgramCache]: Analyzing trace with hash -685269503, now seen corresponding path program 499 times [2021-07-09 17:34:05,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:05,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236058564] [2021-07-09 17:34:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:05,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:05,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236058564] [2021-07-09 17:34:05,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236058564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:05,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858844014] [2021-07-09 17:34:05,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:05,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:05,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:05,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858844014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:05,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:05,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:05,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144591824] [2021-07-09 17:34:05,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:05,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:05,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:05,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:05,827 INFO L87 Difference]: Start difference. First operand 166 states and 349 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:06,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:06,877 INFO L93 Difference]: Finished difference Result 231 states and 458 transitions. [2021-07-09 17:34:06,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:34:06,877 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:06,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:06,877 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:34:06,877 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:34:06,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1127.2ms TimeCoverageRelationStatistics Valid=149, Invalid=1573, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:34:06,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:34:06,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 167. [2021-07-09 17:34:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1204819277108435) internal successors, (352), 166 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 352 transitions. [2021-07-09 17:34:06,879 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 352 transitions. Word has length 20 [2021-07-09 17:34:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:06,879 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 352 transitions. [2021-07-09 17:34:06,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 352 transitions. [2021-07-09 17:34:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:06,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:06,880 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:07,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3644 [2021-07-09 17:34:07,080 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:07,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1956744419, now seen corresponding path program 500 times [2021-07-09 17:34:07,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:07,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530283656] [2021-07-09 17:34:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:07,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:07,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530283656] [2021-07-09 17:34:07,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530283656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:07,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851055324] [2021-07-09 17:34:07,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:07,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:07,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:07,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:34:07,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:07,632 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-09 17:34:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:07,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851055324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:07,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:07,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:07,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120308995] [2021-07-09 17:34:07,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:07,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:07,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:07,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:07,950 INFO L87 Difference]: Start difference. First operand 167 states and 352 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:08,834 INFO L93 Difference]: Finished difference Result 221 states and 433 transitions. [2021-07-09 17:34:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:34:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:08,834 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:34:08,835 INFO L226 Difference]: Without dead ends: 200 [2021-07-09 17:34:08,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1290.6ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:34:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-09 17:34:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 168. [2021-07-09 17:34:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1137724550898205) internal successors, (353), 167 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 353 transitions. [2021-07-09 17:34:08,836 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 353 transitions. Word has length 20 [2021-07-09 17:34:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:08,836 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 353 transitions. [2021-07-09 17:34:08,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:08,837 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 353 transitions. [2021-07-09 17:34:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:08,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:08,837 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:09,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3659,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:09,037 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:09,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:09,038 INFO L82 PathProgramCache]: Analyzing trace with hash 379402689, now seen corresponding path program 501 times [2021-07-09 17:34:09,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:09,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053180694] [2021-07-09 17:34:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:09,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:09,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053180694] [2021-07-09 17:34:09,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053180694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:09,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034758735] [2021-07-09 17:34:09,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:09,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:34:09,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:09,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 17:34:09,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:09,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034758735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:09,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:09,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:09,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114045432] [2021-07-09 17:34:09,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:09,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:09,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:09,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:09,782 INFO L87 Difference]: Start difference. First operand 168 states and 353 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:10,839 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2021-07-09 17:34:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:11,015 INFO L93 Difference]: Finished difference Result 250 states and 485 transitions. [2021-07-09 17:34:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:34:11,016 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:11,016 INFO L225 Difference]: With dead ends: 250 [2021-07-09 17:34:11,016 INFO L226 Difference]: Without dead ends: 232 [2021-07-09 17:34:11,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1462.8ms TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:34:11,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-09 17:34:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 172. [2021-07-09 17:34:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.128654970760234) internal successors, (364), 171 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 364 transitions. [2021-07-09 17:34:11,018 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 364 transitions. Word has length 20 [2021-07-09 17:34:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:11,018 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 364 transitions. [2021-07-09 17:34:11,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:11,018 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 364 transitions. [2021-07-09 17:34:11,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:11,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:11,018 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:11,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-07-09 17:34:11,219 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:11,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1713994019, now seen corresponding path program 502 times [2021-07-09 17:34:11,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:11,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511453991] [2021-07-09 17:34:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:11,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:11,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511453991] [2021-07-09 17:34:11,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511453991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:11,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230547293] [2021-07-09 17:34:11,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:11,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:11,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:11,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230547293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:11,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:11,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:11,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583516788] [2021-07-09 17:34:11,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:11,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:11,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:11,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:11,928 INFO L87 Difference]: Start difference. First operand 172 states and 364 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:13,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:13,246 INFO L93 Difference]: Finished difference Result 250 states and 481 transitions. [2021-07-09 17:34:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:34:13,246 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:13,246 INFO L225 Difference]: With dead ends: 250 [2021-07-09 17:34:13,246 INFO L226 Difference]: Without dead ends: 227 [2021-07-09 17:34:13,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1512.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:34:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-09 17:34:13,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 171. [2021-07-09 17:34:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1176470588235294) internal successors, (360), 170 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 360 transitions. [2021-07-09 17:34:13,248 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 360 transitions. Word has length 20 [2021-07-09 17:34:13,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:13,248 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 360 transitions. [2021-07-09 17:34:13,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:13,248 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 360 transitions. [2021-07-09 17:34:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:13,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:13,249 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:13,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3684,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:13,449 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash 582187675, now seen corresponding path program 503 times [2021-07-09 17:34:13,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:13,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302904763] [2021-07-09 17:34:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:13,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:13,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302904763] [2021-07-09 17:34:13,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302904763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:13,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25110178] [2021-07-09 17:34:13,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:13,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:34:13,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:13,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:34:13,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:14,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25110178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:14,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:14,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:14,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947933758] [2021-07-09 17:34:14,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:14,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:14,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:14,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:14,175 INFO L87 Difference]: Start difference. First operand 171 states and 360 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:14,973 INFO L93 Difference]: Finished difference Result 220 states and 435 transitions. [2021-07-09 17:34:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:34:14,973 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:14,974 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:34:14,974 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:34:14,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1099.1ms TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:34:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:34:14,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 175. [2021-07-09 17:34:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1149425287356323) internal successors, (368), 174 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 368 transitions. [2021-07-09 17:34:14,976 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 368 transitions. Word has length 20 [2021-07-09 17:34:14,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:14,976 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 368 transitions. [2021-07-09 17:34:14,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 368 transitions. [2021-07-09 17:34:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:14,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:14,976 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:15,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3696,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:15,176 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:15,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:15,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1070765699, now seen corresponding path program 504 times [2021-07-09 17:34:15,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:15,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281978219] [2021-07-09 17:34:15,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:15,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:15,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281978219] [2021-07-09 17:34:15,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281978219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:15,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190145048] [2021-07-09 17:34:15,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:15,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:34:15,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:15,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:34:15,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:15,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190145048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:15,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:15,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:15,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947217273] [2021-07-09 17:34:15,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:15,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:15,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:15,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:15,941 INFO L87 Difference]: Start difference. First operand 175 states and 368 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:16,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:16,844 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-07-09 17:34:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:34:16,844 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:16,844 INFO L225 Difference]: With dead ends: 220 [2021-07-09 17:34:16,845 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 17:34:16,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1166.0ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:34:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 17:34:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 176. [2021-07-09 17:34:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1142857142857143) internal successors, (370), 175 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 370 transitions. [2021-07-09 17:34:16,846 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 370 transitions. Word has length 20 [2021-07-09 17:34:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:16,846 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 370 transitions. [2021-07-09 17:34:16,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 370 transitions. [2021-07-09 17:34:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:16,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:16,847 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:17,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-07-09 17:34:17,047 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:17,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1646859867, now seen corresponding path program 505 times [2021-07-09 17:34:17,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:17,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377773246] [2021-07-09 17:34:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:17,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:17,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377773246] [2021-07-09 17:34:17,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377773246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:17,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854807416] [2021-07-09 17:34:17,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:17,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:17,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854807416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:17,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:17,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:17,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123196030] [2021-07-09 17:34:17,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:17,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:17,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:17,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:17,862 INFO L87 Difference]: Start difference. First operand 176 states and 370 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:18,949 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-07-09 17:34:19,163 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2021-07-09 17:34:19,338 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2021-07-09 17:34:19,604 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-07-09 17:34:19,887 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-07-09 17:34:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:20,102 INFO L93 Difference]: Finished difference Result 280 states and 546 transitions. [2021-07-09 17:34:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:34:20,102 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:20,103 INFO L225 Difference]: With dead ends: 280 [2021-07-09 17:34:20,103 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:34:20,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2445.0ms TimeCoverageRelationStatistics Valid=261, Invalid=2189, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:34:20,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:34:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 182. [2021-07-09 17:34:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.149171270718232) internal successors, (389), 181 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 389 transitions. [2021-07-09 17:34:20,105 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 389 transitions. Word has length 20 [2021-07-09 17:34:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:20,105 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 389 transitions. [2021-07-09 17:34:20,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:20,105 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 389 transitions. [2021-07-09 17:34:20,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:20,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:20,106 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:20,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3720,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:20,313 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:20,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1313516099, now seen corresponding path program 506 times [2021-07-09 17:34:20,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:20,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216049978] [2021-07-09 17:34:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:20,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:20,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216049978] [2021-07-09 17:34:20,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216049978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:20,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094928430] [2021-07-09 17:34:20,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:20,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:20,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:34:20,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:20,848 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 17:34:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:21,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094928430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:21,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:21,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:21,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416787094] [2021-07-09 17:34:21,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:21,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:21,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:21,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:21,087 INFO L87 Difference]: Start difference. First operand 182 states and 389 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:22,172 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-07-09 17:34:22,350 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-07-09 17:34:22,552 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-07-09 17:34:22,679 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-07-09 17:34:22,856 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-07-09 17:34:23,046 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-07-09 17:34:23,183 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-07-09 17:34:23,325 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-07-09 17:34:23,830 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-07-09 17:34:23,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:23,937 INFO L93 Difference]: Finished difference Result 307 states and 587 transitions. [2021-07-09 17:34:23,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:34:23,937 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:23,938 INFO L225 Difference]: With dead ends: 307 [2021-07-09 17:34:23,938 INFO L226 Difference]: Without dead ends: 288 [2021-07-09 17:34:23,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 3050.9ms TimeCoverageRelationStatistics Valid=342, Invalid=2628, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:34:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-07-09 17:34:23,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 182. [2021-07-09 17:34:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.154696132596685) internal successors, (390), 181 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 390 transitions. [2021-07-09 17:34:23,940 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 390 transitions. Word has length 20 [2021-07-09 17:34:23,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:23,940 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 390 transitions. [2021-07-09 17:34:23,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 390 transitions. [2021-07-09 17:34:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:23,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:23,940 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:24,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3732,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:24,141 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:24,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:24,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1741066659, now seen corresponding path program 507 times [2021-07-09 17:34:24,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:24,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908733960] [2021-07-09 17:34:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:24,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:24,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908733960] [2021-07-09 17:34:24,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908733960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:24,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138341073] [2021-07-09 17:34:24,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:24,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:34:24,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:24,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:34:24,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:24,700 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:34:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:24,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138341073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:24,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:24,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:24,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061731796] [2021-07-09 17:34:24,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:24,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:24,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:24,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:24,868 INFO L87 Difference]: Start difference. First operand 182 states and 390 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:25,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:25,851 INFO L93 Difference]: Finished difference Result 229 states and 462 transitions. [2021-07-09 17:34:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:34:25,851 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:25,852 INFO L225 Difference]: With dead ends: 229 [2021-07-09 17:34:25,852 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:34:25,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1256.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:34:25,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:34:25,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 184. [2021-07-09 17:34:25,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1530054644808745) internal successors, (394), 183 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 394 transitions. [2021-07-09 17:34:25,854 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 394 transitions. Word has length 20 [2021-07-09 17:34:25,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:25,854 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 394 transitions. [2021-07-09 17:34:25,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:25,854 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 394 transitions. [2021-07-09 17:34:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:25,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:25,854 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:26,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3745,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:26,055 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:26,055 INFO L82 PathProgramCache]: Analyzing trace with hash 163724929, now seen corresponding path program 508 times [2021-07-09 17:34:26,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:26,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120448827] [2021-07-09 17:34:26,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:26,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:26,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120448827] [2021-07-09 17:34:26,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120448827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:26,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894531486] [2021-07-09 17:34:26,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:26,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:26,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:26,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:26,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:26,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894531486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:26,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:26,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:26,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845803709] [2021-07-09 17:34:26,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:26,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:26,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:26,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:26,766 INFO L87 Difference]: Start difference. First operand 184 states and 394 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:28,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:28,457 INFO L93 Difference]: Finished difference Result 256 states and 512 transitions. [2021-07-09 17:34:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:34:28,457 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:28,458 INFO L225 Difference]: With dead ends: 256 [2021-07-09 17:34:28,458 INFO L226 Difference]: Without dead ends: 242 [2021-07-09 17:34:28,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1850.9ms TimeCoverageRelationStatistics Valid=224, Invalid=2326, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:34:28,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-09 17:34:28,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2021-07-09 17:34:28,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1675675675675676) internal successors, (401), 185 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:28,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 401 transitions. [2021-07-09 17:34:28,460 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 401 transitions. Word has length 20 [2021-07-09 17:34:28,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:28,460 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 401 transitions. [2021-07-09 17:34:28,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 401 transitions. [2021-07-09 17:34:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:28,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:28,460 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:28,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3757 [2021-07-09 17:34:28,661 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash 670071195, now seen corresponding path program 509 times [2021-07-09 17:34:28,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:28,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119635823] [2021-07-09 17:34:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:28,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:28,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119635823] [2021-07-09 17:34:28,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119635823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:28,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897545249] [2021-07-09 17:34:28,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:28,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:28,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:28,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:34:28,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:29,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897545249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:29,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:29,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:29,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503801823] [2021-07-09 17:34:29,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:29,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:29,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:29,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:29,406 INFO L87 Difference]: Start difference. First operand 186 states and 401 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:30,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:30,786 INFO L93 Difference]: Finished difference Result 258 states and 517 transitions. [2021-07-09 17:34:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:34:30,786 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:30,787 INFO L225 Difference]: With dead ends: 258 [2021-07-09 17:34:30,787 INFO L226 Difference]: Without dead ends: 240 [2021-07-09 17:34:30,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1578.7ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:34:30,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-09 17:34:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 188. [2021-07-09 17:34:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.165775401069519) internal successors, (405), 187 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 405 transitions. [2021-07-09 17:34:30,789 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 405 transitions. Word has length 20 [2021-07-09 17:34:30,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:30,789 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 405 transitions. [2021-07-09 17:34:30,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:30,789 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 405 transitions. [2021-07-09 17:34:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:30,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:30,789 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:30,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:30,990 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:30,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1466806947, now seen corresponding path program 510 times [2021-07-09 17:34:30,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:30,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733790366] [2021-07-09 17:34:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:31,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:31,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733790366] [2021-07-09 17:34:31,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733790366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:31,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334519865] [2021-07-09 17:34:31,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:31,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:34:31,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:31,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:31,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:31,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334519865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:31,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:31,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:31,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684365952] [2021-07-09 17:34:31,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:31,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:31,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:31,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:31,616 INFO L87 Difference]: Start difference. First operand 188 states and 405 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:33,980 INFO L93 Difference]: Finished difference Result 312 states and 610 transitions. [2021-07-09 17:34:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:34:33,980 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:33,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:33,981 INFO L225 Difference]: With dead ends: 312 [2021-07-09 17:34:33,981 INFO L226 Difference]: Without dead ends: 280 [2021-07-09 17:34:33,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2453.4ms TimeCoverageRelationStatistics Valid=437, Invalid=3985, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 17:34:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-09 17:34:33,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 198. [2021-07-09 17:34:33,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1624365482233503) internal successors, (426), 197 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 426 transitions. [2021-07-09 17:34:33,983 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 426 transitions. Word has length 20 [2021-07-09 17:34:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:33,983 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 426 transitions. [2021-07-09 17:34:33,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 426 transitions. [2021-07-09 17:34:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:33,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:33,984 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:34,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:34,184 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:34,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:34,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1836027257, now seen corresponding path program 511 times [2021-07-09 17:34:34,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:34,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59195666] [2021-07-09 17:34:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:34,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:34,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59195666] [2021-07-09 17:34:34,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59195666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:34,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773717568] [2021-07-09 17:34:34,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:34,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:34,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:34,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773717568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:34,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:34,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:34,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286131237] [2021-07-09 17:34:34,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:34,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:34,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:34,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:34,913 INFO L87 Difference]: Start difference. First operand 198 states and 426 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:35,657 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-07-09 17:34:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:35,657 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:35,658 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:34:35,658 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:34:35,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1095.4ms TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:34:35,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:34:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 199. [2021-07-09 17:34:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1616161616161618) internal successors, (428), 198 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 428 transitions. [2021-07-09 17:34:35,660 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 428 transitions. Word has length 20 [2021-07-09 17:34:35,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:35,660 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 428 transitions. [2021-07-09 17:34:35,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:35,660 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 428 transitions. [2021-07-09 17:34:35,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:35,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:35,660 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:35,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3798 [2021-07-09 17:34:35,861 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:35,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:35,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2134080215, now seen corresponding path program 512 times [2021-07-09 17:34:35,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:35,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790771266] [2021-07-09 17:34:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:36,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:36,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790771266] [2021-07-09 17:34:36,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790771266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:36,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719427011] [2021-07-09 17:34:36,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:36,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:36,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:36,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:34:36,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:36,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719427011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:36,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:36,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:36,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35607168] [2021-07-09 17:34:36,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:36,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:36,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:36,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:36,661 INFO L87 Difference]: Start difference. First operand 199 states and 428 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:37,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:37,402 INFO L93 Difference]: Finished difference Result 221 states and 461 transitions. [2021-07-09 17:34:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:37,402 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:37,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:37,403 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:34:37,403 INFO L226 Difference]: Without dead ends: 206 [2021-07-09 17:34:37,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1182.0ms TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:34:37,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-07-09 17:34:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2021-07-09 17:34:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.1608040201005023) internal successors, (430), 199 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 430 transitions. [2021-07-09 17:34:37,405 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 430 transitions. Word has length 20 [2021-07-09 17:34:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:37,405 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 430 transitions. [2021-07-09 17:34:37,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 430 transitions. [2021-07-09 17:34:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:37,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:37,405 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:37,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3810,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:37,606 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:37,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:37,606 INFO L82 PathProgramCache]: Analyzing trace with hash 481126841, now seen corresponding path program 513 times [2021-07-09 17:34:37,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:37,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622834305] [2021-07-09 17:34:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:37,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:37,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622834305] [2021-07-09 17:34:37,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622834305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:37,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499378488] [2021-07-09 17:34:37,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:37,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:34:37,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:37,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:37,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:38,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499378488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:38,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:38,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:38,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376157562] [2021-07-09 17:34:38,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:38,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:38,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:38,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:38,417 INFO L87 Difference]: Start difference. First operand 200 states and 430 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:39,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:39,150 INFO L93 Difference]: Finished difference Result 221 states and 462 transitions. [2021-07-09 17:34:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:39,151 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:39,151 INFO L225 Difference]: With dead ends: 221 [2021-07-09 17:34:39,151 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:34:39,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1132.1ms TimeCoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:34:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:34:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 201. [2021-07-09 17:34:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.16) internal successors, (432), 200 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 432 transitions. [2021-07-09 17:34:39,153 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 432 transitions. Word has length 20 [2021-07-09 17:34:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:39,153 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 432 transitions. [2021-07-09 17:34:39,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 432 transitions. [2021-07-09 17:34:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:39,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:39,153 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:39,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3822,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:39,354 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:39,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:39,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1096214889, now seen corresponding path program 514 times [2021-07-09 17:34:39,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:39,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858994258] [2021-07-09 17:34:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:39,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:39,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858994258] [2021-07-09 17:34:39,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858994258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:39,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998310528] [2021-07-09 17:34:39,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:39,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:39,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:39,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:39,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:40,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998310528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:40,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:40,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:34:40,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921899371] [2021-07-09 17:34:40,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:34:40,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:40,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:34:40,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:34:40,201 INFO L87 Difference]: Start difference. First operand 201 states and 432 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:40,972 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-07-09 17:34:41,294 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-07-09 17:34:41,513 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-07-09 17:34:41,843 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2021-07-09 17:34:42,127 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-07-09 17:34:42,266 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-07-09 17:34:42,540 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2021-07-09 17:34:42,819 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-07-09 17:34:42,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:42,862 INFO L93 Difference]: Finished difference Result 280 states and 569 transitions. [2021-07-09 17:34:42,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:34:42,862 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:42,863 INFO L225 Difference]: With dead ends: 280 [2021-07-09 17:34:42,863 INFO L226 Difference]: Without dead ends: 262 [2021-07-09 17:34:42,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2973.9ms TimeCoverageRelationStatistics Valid=260, Invalid=1996, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:34:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-09 17:34:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 207. [2021-07-09 17:34:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.1893203883495147) internal successors, (451), 206 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 451 transitions. [2021-07-09 17:34:42,865 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 451 transitions. Word has length 20 [2021-07-09 17:34:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:42,865 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 451 transitions. [2021-07-09 17:34:42,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 451 transitions. [2021-07-09 17:34:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:42,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:42,865 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:43,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3834,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:43,066 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:43,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:43,066 INFO L82 PathProgramCache]: Analyzing trace with hash -256963049, now seen corresponding path program 515 times [2021-07-09 17:34:43,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:43,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261818100] [2021-07-09 17:34:43,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:43,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:43,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261818100] [2021-07-09 17:34:43,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261818100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:43,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224193944] [2021-07-09 17:34:43,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:43,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:34:43,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:43,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:34:43,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:43,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224193944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:43,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:43,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:34:43,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647707615] [2021-07-09 17:34:43,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:34:43,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:43,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:34:43,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:43,786 INFO L87 Difference]: Start difference. First operand 207 states and 451 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:44,168 INFO L93 Difference]: Finished difference Result 231 states and 488 transitions. [2021-07-09 17:34:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:34:44,168 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:44,168 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:34:44,168 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:34:44,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 789.6ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:34:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 210. [2021-07-09 17:34:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.186602870813397) internal successors, (457), 209 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 457 transitions. [2021-07-09 17:34:44,170 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 457 transitions. Word has length 20 [2021-07-09 17:34:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:44,171 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 457 transitions. [2021-07-09 17:34:44,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 457 transitions. [2021-07-09 17:34:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:44,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:44,171 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:44,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3846,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:44,371 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:44,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1909916423, now seen corresponding path program 516 times [2021-07-09 17:34:44,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:44,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393319440] [2021-07-09 17:34:44,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:44,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:44,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393319440] [2021-07-09 17:34:44,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393319440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:44,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866999029] [2021-07-09 17:34:44,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:44,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:34:44,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:44,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:34:44,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:45,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866999029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:45,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:45,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:34:45,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733086449] [2021-07-09 17:34:45,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:34:45,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:45,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:34:45,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:45,126 INFO L87 Difference]: Start difference. First operand 210 states and 457 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:45,570 INFO L93 Difference]: Finished difference Result 231 states and 489 transitions. [2021-07-09 17:34:45,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:45,570 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:45,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:45,570 INFO L225 Difference]: With dead ends: 231 [2021-07-09 17:34:45,570 INFO L226 Difference]: Without dead ends: 218 [2021-07-09 17:34:45,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 842.1ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:45,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-07-09 17:34:45,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 211. [2021-07-09 17:34:45,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.1857142857142855) internal successors, (459), 210 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 459 transitions. [2021-07-09 17:34:45,572 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 459 transitions. Word has length 20 [2021-07-09 17:34:45,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:45,573 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 459 transitions. [2021-07-09 17:34:45,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 459 transitions. [2021-07-09 17:34:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:45,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:45,573 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:45,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3858 [2021-07-09 17:34:45,773 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:45,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:45,774 INFO L82 PathProgramCache]: Analyzing trace with hash 807709143, now seen corresponding path program 517 times [2021-07-09 17:34:45,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:45,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867583132] [2021-07-09 17:34:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:45,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:45,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867583132] [2021-07-09 17:34:45,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867583132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:45,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703682687] [2021-07-09 17:34:45,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:46,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703682687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:46,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:46,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:34:46,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567388883] [2021-07-09 17:34:46,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:34:46,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:46,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:34:46,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:46,505 INFO L87 Difference]: Start difference. First operand 211 states and 459 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:47,059 INFO L93 Difference]: Finished difference Result 243 states and 510 transitions. [2021-07-09 17:34:47,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:34:47,059 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:47,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:47,059 INFO L225 Difference]: With dead ends: 243 [2021-07-09 17:34:47,059 INFO L226 Difference]: Without dead ends: 232 [2021-07-09 17:34:47,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 867.9ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:34:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-09 17:34:47,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 212. [2021-07-09 17:34:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.184834123222749) internal successors, (461), 211 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 461 transitions. [2021-07-09 17:34:47,062 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 461 transitions. Word has length 20 [2021-07-09 17:34:47,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:47,062 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 461 transitions. [2021-07-09 17:34:47,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:47,062 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 461 transitions. [2021-07-09 17:34:47,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:47,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:47,062 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:47,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 518 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3870 [2021-07-09 17:34:47,263 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:47,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2142300473, now seen corresponding path program 518 times [2021-07-09 17:34:47,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:47,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201112155] [2021-07-09 17:34:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:47,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:47,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201112155] [2021-07-09 17:34:47,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201112155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:47,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452299518] [2021-07-09 17:34:47,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:47,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:47,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:47,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:34:47,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:47,754 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 17:34:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:47,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452299518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:47,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:47,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:34:47,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816379010] [2021-07-09 17:34:47,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:34:47,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:47,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:34:47,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:47,981 INFO L87 Difference]: Start difference. First operand 212 states and 461 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:48,490 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-07-09 17:34:48,690 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-07-09 17:34:48,976 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-07-09 17:34:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:49,684 INFO L93 Difference]: Finished difference Result 341 states and 671 transitions. [2021-07-09 17:34:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:34:49,684 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:49,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:49,684 INFO L225 Difference]: With dead ends: 341 [2021-07-09 17:34:49,685 INFO L226 Difference]: Without dead ends: 308 [2021-07-09 17:34:49,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1921.2ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:34:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-09 17:34:49,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 215. [2021-07-09 17:34:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2009345794392523) internal successors, (471), 214 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 471 transitions. [2021-07-09 17:34:49,687 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 471 transitions. Word has length 20 [2021-07-09 17:34:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:49,687 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 471 transitions. [2021-07-09 17:34:49,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:49,687 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 471 transitions. [2021-07-09 17:34:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:49,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:49,687 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:49,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3882,519 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:49,888 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:49,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:49,888 INFO L82 PathProgramCache]: Analyzing trace with hash 901915935, now seen corresponding path program 519 times [2021-07-09 17:34:49,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:49,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824141779] [2021-07-09 17:34:49,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:50,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:50,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824141779] [2021-07-09 17:34:50,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824141779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:50,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836535394] [2021-07-09 17:34:50,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:50,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:34:50,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:50,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:34:50,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:50,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836535394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:50,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:50,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:34:50,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141625967] [2021-07-09 17:34:50,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:34:50,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:50,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:34:50,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:50,592 INFO L87 Difference]: Start difference. First operand 215 states and 471 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,105 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-07-09 17:34:51,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:51,338 INFO L93 Difference]: Finished difference Result 248 states and 523 transitions. [2021-07-09 17:34:51,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:34:51,338 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:51,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:51,338 INFO L225 Difference]: With dead ends: 248 [2021-07-09 17:34:51,338 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 17:34:51,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1050.1ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:34:51,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 17:34:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 217. [2021-07-09 17:34:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2037037037037037) internal successors, (476), 216 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 476 transitions. [2021-07-09 17:34:51,340 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 476 transitions. Word has length 20 [2021-07-09 17:34:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:51,340 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 476 transitions. [2021-07-09 17:34:51,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 476 transitions. [2021-07-09 17:34:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:51,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:51,341 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:51,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3895,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:51,541 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:51,541 INFO L82 PathProgramCache]: Analyzing trace with hash -675425795, now seen corresponding path program 520 times [2021-07-09 17:34:51,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:51,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098251070] [2021-07-09 17:34:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:51,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:51,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098251070] [2021-07-09 17:34:51,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098251070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:51,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051347616] [2021-07-09 17:34:51,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:51,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:51,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:51,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:51,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:52,060 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:34:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:52,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051347616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:52,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:52,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:34:52,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129383827] [2021-07-09 17:34:52,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:34:52,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:52,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:34:52,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:52,229 INFO L87 Difference]: Start difference. First operand 217 states and 476 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:52,926 INFO L93 Difference]: Finished difference Result 254 states and 532 transitions. [2021-07-09 17:34:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:34:52,927 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:52,927 INFO L225 Difference]: With dead ends: 254 [2021-07-09 17:34:52,927 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 17:34:52,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 959.0ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:34:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 17:34:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 218. [2021-07-09 17:34:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.19815668202765) internal successors, (477), 217 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:52,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 477 transitions. [2021-07-09 17:34:52,929 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 477 transitions. Word has length 20 [2021-07-09 17:34:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:52,929 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 477 transitions. [2021-07-09 17:34:52,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 477 transitions. [2021-07-09 17:34:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:52,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:52,930 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:53,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:53,130 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:53,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:53,130 INFO L82 PathProgramCache]: Analyzing trace with hash 659165535, now seen corresponding path program 521 times [2021-07-09 17:34:53,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:53,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569091550] [2021-07-09 17:34:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:53,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:53,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569091550] [2021-07-09 17:34:53,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569091550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:53,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2566998] [2021-07-09 17:34:53,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:53,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:34:53,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:53,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:53,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:53,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2566998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:53,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:53,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:34:53,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690265644] [2021-07-09 17:34:53,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:34:53,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:34:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:53,754 INFO L87 Difference]: Start difference. First operand 218 states and 477 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:55,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:55,180 INFO L93 Difference]: Finished difference Result 308 states and 630 transitions. [2021-07-09 17:34:55,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:34:55,181 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:55,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:55,181 INFO L225 Difference]: With dead ends: 308 [2021-07-09 17:34:55,181 INFO L226 Difference]: Without dead ends: 276 [2021-07-09 17:34:55,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1574.9ms TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:34:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-07-09 17:34:55,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 220. [2021-07-09 17:34:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2146118721461185) internal successors, (485), 219 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 485 transitions. [2021-07-09 17:34:55,184 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 485 transitions. Word has length 20 [2021-07-09 17:34:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:55,184 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 485 transitions. [2021-07-09 17:34:55,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:55,184 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 485 transitions. [2021-07-09 17:34:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:55,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:55,184 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:55,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3921,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:55,385 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:55,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:55,385 INFO L82 PathProgramCache]: Analyzing trace with hash -169079529, now seen corresponding path program 522 times [2021-07-09 17:34:55,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:55,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830114852] [2021-07-09 17:34:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:55,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:55,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830114852] [2021-07-09 17:34:55,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830114852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:55,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622399743] [2021-07-09 17:34:55,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:55,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:34:55,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:55,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:55,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:55,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622399743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:55,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:55,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:34:55,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460432363] [2021-07-09 17:34:55,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:34:55,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:55,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:34:55,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:55,998 INFO L87 Difference]: Start difference. First operand 220 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:56,808 INFO L93 Difference]: Finished difference Result 273 states and 580 transitions. [2021-07-09 17:34:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:34:56,808 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:56,809 INFO L225 Difference]: With dead ends: 273 [2021-07-09 17:34:56,809 INFO L226 Difference]: Without dead ends: 255 [2021-07-09 17:34:56,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1016.9ms TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:34:56,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-09 17:34:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 220. [2021-07-09 17:34:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2146118721461185) internal successors, (485), 219 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 485 transitions. [2021-07-09 17:34:56,811 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 485 transitions. Word has length 20 [2021-07-09 17:34:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:56,811 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 485 transitions. [2021-07-09 17:34:56,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:56,811 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 485 transitions. [2021-07-09 17:34:56,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:56,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:56,811 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:57,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3933,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:57,012 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash -212189635, now seen corresponding path program 523 times [2021-07-09 17:34:57,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:57,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695296629] [2021-07-09 17:34:57,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:57,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695296629] [2021-07-09 17:34:57,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695296629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408136240] [2021-07-09 17:34:57,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:57,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:57,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:57,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408136240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:57,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:57,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:34:57,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900333272] [2021-07-09 17:34:57,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:34:57,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:57,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:34:57,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:57,563 INFO L87 Difference]: Start difference. First operand 220 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:58,319 INFO L93 Difference]: Finished difference Result 284 states and 592 transitions. [2021-07-09 17:34:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:34:58,319 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:58,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:58,320 INFO L225 Difference]: With dead ends: 284 [2021-07-09 17:34:58,320 INFO L226 Difference]: Without dead ends: 268 [2021-07-09 17:34:58,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 860.2ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:34:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-09 17:34:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 225. [2021-07-09 17:34:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2276785714285716) internal successors, (499), 224 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 499 transitions. [2021-07-09 17:34:58,322 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 499 transitions. Word has length 20 [2021-07-09 17:34:58,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:58,322 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 499 transitions. [2021-07-09 17:34:58,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:58,322 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 499 transitions. [2021-07-09 17:34:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:58,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:58,322 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:58,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3945,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:58,523 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:58,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2125594183, now seen corresponding path program 524 times [2021-07-09 17:34:58,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:58,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28648751] [2021-07-09 17:34:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:58,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:58,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28648751] [2021-07-09 17:34:58,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28648751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:58,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830738225] [2021-07-09 17:34:58,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:58,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:58,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:58,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:34:58,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:59,054 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:34:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:59,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830738225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:59,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:59,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:34:59,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386723555] [2021-07-09 17:34:59,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:34:59,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:59,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:34:59,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:34:59,210 INFO L87 Difference]: Start difference. First operand 225 states and 499 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:59,594 INFO L93 Difference]: Finished difference Result 247 states and 533 transitions. [2021-07-09 17:34:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:34:59,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:34:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:59,595 INFO L225 Difference]: With dead ends: 247 [2021-07-09 17:34:59,595 INFO L226 Difference]: Without dead ends: 234 [2021-07-09 17:34:59,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 716.4ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:34:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-09 17:34:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2021-07-09 17:34:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.2246696035242293) internal successors, (505), 227 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 505 transitions. [2021-07-09 17:34:59,597 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 505 transitions. Word has length 20 [2021-07-09 17:34:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:59,597 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 505 transitions. [2021-07-09 17:34:59,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 505 transitions. [2021-07-09 17:34:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:34:59,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:59,598 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:59,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3957,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:59,798 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:59,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:59,798 INFO L82 PathProgramCache]: Analyzing trace with hash 592031383, now seen corresponding path program 525 times [2021-07-09 17:34:59,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:59,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879150190] [2021-07-09 17:34:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:00,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:00,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879150190] [2021-07-09 17:35:00,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879150190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:00,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984534147] [2021-07-09 17:35:00,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:00,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:00,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:00,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:00,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:00,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984534147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:00,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:00,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:00,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580482237] [2021-07-09 17:35:00,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:00,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:00,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:00,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:00,520 INFO L87 Difference]: Start difference. First operand 228 states and 505 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:01,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:01,260 INFO L93 Difference]: Finished difference Result 279 states and 585 transitions. [2021-07-09 17:35:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:35:01,260 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:01,261 INFO L225 Difference]: With dead ends: 279 [2021-07-09 17:35:01,261 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:35:01,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1024.2ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:35:01,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:35:01,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 228. [2021-07-09 17:35:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.2246696035242293) internal successors, (505), 227 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 505 transitions. [2021-07-09 17:35:01,263 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 505 transitions. Word has length 20 [2021-07-09 17:35:01,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:01,263 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 505 transitions. [2021-07-09 17:35:01,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 505 transitions. [2021-07-09 17:35:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:01,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:01,264 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:01,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-07-09 17:35:01,464 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:01,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:01,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1098377649, now seen corresponding path program 526 times [2021-07-09 17:35:01,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:01,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129727848] [2021-07-09 17:35:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:01,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129727848] [2021-07-09 17:35:01,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129727848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384395715] [2021-07-09 17:35:01,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:01,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:01,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:01,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:01,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:02,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384395715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:02,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:02,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:02,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050505019] [2021-07-09 17:35:02,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:02,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:02,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:02,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:02,103 INFO L87 Difference]: Start difference. First operand 228 states and 505 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:03,317 INFO L93 Difference]: Finished difference Result 276 states and 586 transitions. [2021-07-09 17:35:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:35:03,318 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:03,318 INFO L225 Difference]: With dead ends: 276 [2021-07-09 17:35:03,318 INFO L226 Difference]: Without dead ends: 258 [2021-07-09 17:35:03,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1376.8ms TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:35:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-09 17:35:03,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 232. [2021-07-09 17:35:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.220779220779221) internal successors, (513), 231 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:03,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 513 transitions. [2021-07-09 17:35:03,320 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 513 transitions. Word has length 20 [2021-07-09 17:35:03,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:03,321 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 513 transitions. [2021-07-09 17:35:03,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:03,321 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 513 transitions. [2021-07-09 17:35:03,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:03,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:03,321 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:03,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:03,521 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:03,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:03,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1861998317, now seen corresponding path program 527 times [2021-07-09 17:35:03,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:03,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540908848] [2021-07-09 17:35:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:03,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:03,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540908848] [2021-07-09 17:35:03,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540908848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:03,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054299936] [2021-07-09 17:35:03,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:03,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:03,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:03,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:03,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:04,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054299936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:04,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:04,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:04,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824795599] [2021-07-09 17:35:04,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:04,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:04,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:04,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:04,135 INFO L87 Difference]: Start difference. First operand 232 states and 513 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:04,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:04,680 INFO L93 Difference]: Finished difference Result 285 states and 598 transitions. [2021-07-09 17:35:04,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:35:04,680 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:04,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:04,681 INFO L225 Difference]: With dead ends: 285 [2021-07-09 17:35:04,681 INFO L226 Difference]: Without dead ends: 259 [2021-07-09 17:35:04,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 786.1ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:35:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-07-09 17:35:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2021-07-09 17:35:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.217948717948718) internal successors, (519), 234 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 519 transitions. [2021-07-09 17:35:04,683 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 519 transitions. Word has length 20 [2021-07-09 17:35:04,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:04,683 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 519 transitions. [2021-07-09 17:35:04,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:04,683 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 519 transitions. [2021-07-09 17:35:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:04,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:04,683 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:04,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3996 [2021-07-09 17:35:04,884 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:04,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1895113401, now seen corresponding path program 528 times [2021-07-09 17:35:04,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:04,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711168312] [2021-07-09 17:35:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:05,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:05,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711168312] [2021-07-09 17:35:05,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711168312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:05,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193561738] [2021-07-09 17:35:05,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:05,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:35:05,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:05,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:05,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:05,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193561738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:05,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:05,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:05,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235072150] [2021-07-09 17:35:05,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:05,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:05,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:05,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:05,456 INFO L87 Difference]: Start difference. First operand 235 states and 519 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:06,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:06,278 INFO L93 Difference]: Finished difference Result 312 states and 656 transitions. [2021-07-09 17:35:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:35:06,278 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:06,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:06,279 INFO L225 Difference]: With dead ends: 312 [2021-07-09 17:35:06,279 INFO L226 Difference]: Without dead ends: 293 [2021-07-09 17:35:06,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 919.4ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:35:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-07-09 17:35:06,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 236. [2021-07-09 17:35:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.2212765957446807) internal successors, (522), 235 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 522 transitions. [2021-07-09 17:35:06,281 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 522 transitions. Word has length 20 [2021-07-09 17:35:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:06,281 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 522 transitions. [2021-07-09 17:35:06,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 522 transitions. [2021-07-09 17:35:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:06,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:06,282 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:06,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:06,482 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:06,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:06,482 INFO L82 PathProgramCache]: Analyzing trace with hash -384757289, now seen corresponding path program 529 times [2021-07-09 17:35:06,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:06,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116068623] [2021-07-09 17:35:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:06,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:06,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116068623] [2021-07-09 17:35:06,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116068623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:06,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315037945] [2021-07-09 17:35:06,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:06,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:06,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:07,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315037945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:07,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:07,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:07,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281030102] [2021-07-09 17:35:07,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:07,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:07,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:07,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:07,135 INFO L87 Difference]: Start difference. First operand 236 states and 522 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:07,982 INFO L93 Difference]: Finished difference Result 282 states and 600 transitions. [2021-07-09 17:35:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:35:07,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:07,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:07,982 INFO L225 Difference]: With dead ends: 282 [2021-07-09 17:35:07,982 INFO L226 Difference]: Without dead ends: 268 [2021-07-09 17:35:07,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1028.8ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:35:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-09 17:35:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2021-07-09 17:35:07,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.219409282700422) internal successors, (526), 237 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 526 transitions. [2021-07-09 17:35:07,985 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 526 transitions. Word has length 20 [2021-07-09 17:35:07,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:07,985 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 526 transitions. [2021-07-09 17:35:07,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:07,985 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 526 transitions. [2021-07-09 17:35:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:07,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:07,985 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:08,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4021,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:08,186 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:08,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:08,186 INFO L82 PathProgramCache]: Analyzing trace with hash 411978463, now seen corresponding path program 530 times [2021-07-09 17:35:08,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:08,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900011892] [2021-07-09 17:35:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:08,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:08,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900011892] [2021-07-09 17:35:08,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900011892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:08,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755263020] [2021-07-09 17:35:08,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:08,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:08,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:08,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:08,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:08,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755263020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:08,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:08,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:08,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055282642] [2021-07-09 17:35:08,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:08,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:08,765 INFO L87 Difference]: Start difference. First operand 238 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:09,289 INFO L93 Difference]: Finished difference Result 304 states and 642 transitions. [2021-07-09 17:35:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:35:09,290 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:09,290 INFO L225 Difference]: With dead ends: 304 [2021-07-09 17:35:09,290 INFO L226 Difference]: Without dead ends: 285 [2021-07-09 17:35:09,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 753.9ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:35:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-07-09 17:35:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 238. [2021-07-09 17:35:09,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.219409282700422) internal successors, (526), 237 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 526 transitions. [2021-07-09 17:35:09,293 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 526 transitions. Word has length 20 [2021-07-09 17:35:09,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:09,293 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 526 transitions. [2021-07-09 17:35:09,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 526 transitions. [2021-07-09 17:35:09,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:09,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:09,293 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:09,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:09,493 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:09,494 INFO L82 PathProgramCache]: Analyzing trace with hash 918324729, now seen corresponding path program 531 times [2021-07-09 17:35:09,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:09,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706123294] [2021-07-09 17:35:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:09,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:09,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706123294] [2021-07-09 17:35:09,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706123294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:09,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385110803] [2021-07-09 17:35:09,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:09,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:35:09,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:09,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 17:35:09,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:10,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385110803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:10,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:10,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:10,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755049361] [2021-07-09 17:35:10,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:10,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:10,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:10,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:10,176 INFO L87 Difference]: Start difference. First operand 238 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:11,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:11,047 INFO L93 Difference]: Finished difference Result 322 states and 659 transitions. [2021-07-09 17:35:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:35:11,047 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:11,048 INFO L225 Difference]: With dead ends: 322 [2021-07-09 17:35:11,048 INFO L226 Difference]: Without dead ends: 297 [2021-07-09 17:35:11,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1148.0ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:35:11,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-09 17:35:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 239. [2021-07-09 17:35:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.2184873949579833) internal successors, (528), 238 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:11,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 528 transitions. [2021-07-09 17:35:11,050 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 528 transitions. Word has length 20 [2021-07-09 17:35:11,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:11,050 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 528 transitions. [2021-07-09 17:35:11,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 528 transitions. [2021-07-09 17:35:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:11,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:11,051 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:11,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:11,251 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:11,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:11,251 INFO L82 PathProgramCache]: Analyzing trace with hash -958444701, now seen corresponding path program 532 times [2021-07-09 17:35:11,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:11,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863006436] [2021-07-09 17:35:11,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:11,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:11,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863006436] [2021-07-09 17:35:11,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863006436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:11,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781834796] [2021-07-09 17:35:11,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:11,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:11,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:11,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:11,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:11,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781834796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:11,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:11,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:35:11,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037978474] [2021-07-09 17:35:11,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:35:11,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:11,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:35:11,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:11,904 INFO L87 Difference]: Start difference. First operand 239 states and 528 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:12,824 INFO L93 Difference]: Finished difference Result 268 states and 583 transitions. [2021-07-09 17:35:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:35:12,824 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:12,824 INFO L225 Difference]: With dead ends: 268 [2021-07-09 17:35:12,824 INFO L226 Difference]: Without dead ends: 251 [2021-07-09 17:35:12,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1123.3ms TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:35:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-09 17:35:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 240. [2021-07-09 17:35:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.217573221757322) internal successors, (530), 239 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-07-09 17:35:12,827 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-07-09 17:35:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:12,827 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-07-09 17:35:12,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:12,827 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-07-09 17:35:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:12,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:12,827 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:13,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-07-09 17:35:13,028 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:13,028 INFO L82 PathProgramCache]: Analyzing trace with hash -660391743, now seen corresponding path program 533 times [2021-07-09 17:35:13,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:13,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435497907] [2021-07-09 17:35:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:13,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:13,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435497907] [2021-07-09 17:35:13,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435497907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:13,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779521302] [2021-07-09 17:35:13,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:13,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:35:13,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:13,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:13,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:13,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779521302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:13,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:13,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:35:13,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192395876] [2021-07-09 17:35:13,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:35:13,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:13,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:35:13,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:13,807 INFO L87 Difference]: Start difference. First operand 240 states and 530 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:14,385 INFO L93 Difference]: Finished difference Result 259 states and 558 transitions. [2021-07-09 17:35:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:14,385 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:14,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:14,386 INFO L225 Difference]: With dead ends: 259 [2021-07-09 17:35:14,386 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 17:35:14,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 987.6ms TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:35:14,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 17:35:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2021-07-09 17:35:14,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-07-09 17:35:14,388 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-07-09 17:35:14,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:14,388 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-07-09 17:35:14,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:14,388 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-07-09 17:35:14,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:14,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:14,389 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:14,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:14,589 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:14,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:14,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1981622179, now seen corresponding path program 534 times [2021-07-09 17:35:14,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:14,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385936068] [2021-07-09 17:35:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:14,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:14,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385936068] [2021-07-09 17:35:14,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385936068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:14,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380160807] [2021-07-09 17:35:14,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:14,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:35:14,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:14,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:14,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:15,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380160807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:15,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:15,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:35:15,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302604513] [2021-07-09 17:35:15,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:35:15,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:15,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:35:15,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:15,406 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:16,091 INFO L93 Difference]: Finished difference Result 258 states and 557 transitions. [2021-07-09 17:35:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:16,091 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:16,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:16,092 INFO L225 Difference]: With dead ends: 258 [2021-07-09 17:35:16,092 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:35:16,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1146.8ms TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:35:16,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:35:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-07-09 17:35:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-07-09 17:35:16,094 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-07-09 17:35:16,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:16,094 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-07-09 17:35:16,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:16,094 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-07-09 17:35:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:16,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:16,095 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:16,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4085 [2021-07-09 17:35:16,295 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:16,295 INFO L82 PathProgramCache]: Analyzing trace with hash 404280449, now seen corresponding path program 535 times [2021-07-09 17:35:16,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:16,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448905506] [2021-07-09 17:35:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:16,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:16,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448905506] [2021-07-09 17:35:16,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448905506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:16,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147659369] [2021-07-09 17:35:16,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:16,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:16,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:17,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147659369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:17,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:17,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:35:17,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249674863] [2021-07-09 17:35:17,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:35:17,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:17,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:35:17,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:17,090 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:18,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:18,543 INFO L93 Difference]: Finished difference Result 283 states and 603 transitions. [2021-07-09 17:35:18,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:35:18,544 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:18,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:18,544 INFO L225 Difference]: With dead ends: 283 [2021-07-09 17:35:18,544 INFO L226 Difference]: Without dead ends: 269 [2021-07-09 17:35:18,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1702.9ms TimeCoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:35:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-07-09 17:35:18,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 241. [2021-07-09 17:35:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:18,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-07-09 17:35:18,546 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-07-09 17:35:18,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:18,547 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-07-09 17:35:18,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:18,547 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-07-09 17:35:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:18,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:18,547 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:18,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4097 [2021-07-09 17:35:18,747 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:18,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:18,748 INFO L82 PathProgramCache]: Analyzing trace with hash 607065435, now seen corresponding path program 536 times [2021-07-09 17:35:18,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:18,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402431406] [2021-07-09 17:35:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:18,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:18,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402431406] [2021-07-09 17:35:18,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402431406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:18,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960508579] [2021-07-09 17:35:18,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:18,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:18,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:18,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:18,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:19,231 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 17:35:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:19,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960508579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:19,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:19,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:35:19,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389967195] [2021-07-09 17:35:19,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:35:19,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:19,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:35:19,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:19,430 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:19,993 INFO L93 Difference]: Finished difference Result 260 states and 560 transitions. [2021-07-09 17:35:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:19,993 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:19,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:19,993 INFO L225 Difference]: With dead ends: 260 [2021-07-09 17:35:19,993 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:35:19,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 896.4ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:35:19,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:35:19,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-07-09 17:35:19,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-07-09 17:35:19,996 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-07-09 17:35:19,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:19,996 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-07-09 17:35:19,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-07-09 17:35:19,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:19,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:19,996 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:20,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-07-09 17:35:20,197 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:20,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1045887939, now seen corresponding path program 537 times [2021-07-09 17:35:20,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:20,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261459917] [2021-07-09 17:35:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:20,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:20,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261459917] [2021-07-09 17:35:20,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261459917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:20,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126619435] [2021-07-09 17:35:20,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:20,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:35:20,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:20,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:20,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126619435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:20,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:20,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:35:20,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883893255] [2021-07-09 17:35:20,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:35:20,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:20,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:35:20,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:20,844 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:22,097 INFO L93 Difference]: Finished difference Result 297 states and 622 transitions. [2021-07-09 17:35:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:35:22,098 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:22,098 INFO L225 Difference]: With dead ends: 297 [2021-07-09 17:35:22,098 INFO L226 Difference]: Without dead ends: 290 [2021-07-09 17:35:22,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1427.0ms TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:35:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-07-09 17:35:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 243. [2021-07-09 17:35:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.21900826446281) internal successors, (537), 242 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 537 transitions. [2021-07-09 17:35:22,101 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 537 transitions. Word has length 20 [2021-07-09 17:35:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:22,101 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 537 transitions. [2021-07-09 17:35:22,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 537 transitions. [2021-07-09 17:35:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:22,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:22,101 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:22,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4124,538 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:22,302 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:22,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1671737627, now seen corresponding path program 538 times [2021-07-09 17:35:22,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:22,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144191562] [2021-07-09 17:35:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:22,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:22,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144191562] [2021-07-09 17:35:22,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144191562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:22,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337731355] [2021-07-09 17:35:22,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:22,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:22,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:22,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:22,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:23,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337731355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:23,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:23,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:35:23,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608546145] [2021-07-09 17:35:23,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:35:23,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:23,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:35:23,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:23,123 INFO L87 Difference]: Start difference. First operand 243 states and 537 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:24,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:24,138 INFO L93 Difference]: Finished difference Result 290 states and 611 transitions. [2021-07-09 17:35:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:35:24,138 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:24,139 INFO L225 Difference]: With dead ends: 290 [2021-07-09 17:35:24,139 INFO L226 Difference]: Without dead ends: 266 [2021-07-09 17:35:24,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1357.8ms TimeCoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:35:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-09 17:35:24,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 242. [2021-07-09 17:35:24,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-07-09 17:35:24,141 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-07-09 17:35:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:24,141 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-07-09 17:35:24,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-07-09 17:35:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:24,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:24,142 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:24,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:24,342 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:24,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1765944419, now seen corresponding path program 539 times [2021-07-09 17:35:24,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:24,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089880575] [2021-07-09 17:35:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:24,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:24,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089880575] [2021-07-09 17:35:24,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089880575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:24,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033985228] [2021-07-09 17:35:24,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:24,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:24,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:24,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:24,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:24,893 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:35:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:25,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033985228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:25,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:25,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:35:25,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906852521] [2021-07-09 17:35:25,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:35:25,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:25,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:35:25,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:25,050 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:25,570 INFO L93 Difference]: Finished difference Result 259 states and 559 transitions. [2021-07-09 17:35:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:25,571 INFO L225 Difference]: With dead ends: 259 [2021-07-09 17:35:25,571 INFO L226 Difference]: Without dead ends: 246 [2021-07-09 17:35:25,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 884.3ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:35:25,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-09 17:35:25,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2021-07-09 17:35:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.2148760330578514) internal successors, (536), 242 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 536 transitions. [2021-07-09 17:35:25,573 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 536 transitions. Word has length 20 [2021-07-09 17:35:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:25,573 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 536 transitions. [2021-07-09 17:35:25,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 536 transitions. [2021-07-09 17:35:25,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:25,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:25,574 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:25,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4151,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:25,774 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:25,774 INFO L82 PathProgramCache]: Analyzing trace with hash 188602689, now seen corresponding path program 540 times [2021-07-09 17:35:25,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:25,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265434224] [2021-07-09 17:35:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:26,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:26,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265434224] [2021-07-09 17:35:26,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265434224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:26,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487983249] [2021-07-09 17:35:26,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:26,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:35:26,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:26,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:26,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:26,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487983249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:26,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:26,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:35:26,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648873261] [2021-07-09 17:35:26,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:35:26,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:26,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:35:26,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:26,471 INFO L87 Difference]: Start difference. First operand 243 states and 536 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:27,680 INFO L93 Difference]: Finished difference Result 284 states and 605 transitions. [2021-07-09 17:35:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:35:27,680 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:27,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:27,680 INFO L225 Difference]: With dead ends: 284 [2021-07-09 17:35:27,680 INFO L226 Difference]: Without dead ends: 270 [2021-07-09 17:35:27,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1439.8ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:35:27,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-07-09 17:35:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 242. [2021-07-09 17:35:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-07-09 17:35:27,683 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-07-09 17:35:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:27,683 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-07-09 17:35:27,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-07-09 17:35:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:27,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:27,683 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:27,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4163 [2021-07-09 17:35:27,884 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:27,884 INFO L82 PathProgramCache]: Analyzing trace with hash 694948955, now seen corresponding path program 541 times [2021-07-09 17:35:27,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:27,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730278865] [2021-07-09 17:35:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:28,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:28,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730278865] [2021-07-09 17:35:28,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730278865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:28,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582307283] [2021-07-09 17:35:28,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:28,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:28,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582307283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:28,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:28,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:35:28,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536108655] [2021-07-09 17:35:28,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:35:28,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:28,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:35:28,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:35:28,533 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:29,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:29,293 INFO L93 Difference]: Finished difference Result 283 states and 601 transitions. [2021-07-09 17:35:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:35:29,293 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:29,294 INFO L225 Difference]: With dead ends: 283 [2021-07-09 17:35:29,294 INFO L226 Difference]: Without dead ends: 265 [2021-07-09 17:35:29,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 962.2ms TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:35:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-09 17:35:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 240. [2021-07-09 17:35:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.217573221757322) internal successors, (530), 239 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-07-09 17:35:29,296 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-07-09 17:35:29,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:29,296 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-07-09 17:35:29,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-07-09 17:35:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:29,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:29,296 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:29,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4176 [2021-07-09 17:35:29,497 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:29,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:29,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1243532289, now seen corresponding path program 542 times [2021-07-09 17:35:29,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:29,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341018547] [2021-07-09 17:35:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:29,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:29,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341018547] [2021-07-09 17:35:29,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341018547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:29,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156001585] [2021-07-09 17:35:29,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:29,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:29,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:29,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:30,032 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 17:35:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:30,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156001585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:30,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:30,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:30,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449520139] [2021-07-09 17:35:30,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:30,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:30,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:30,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:30,227 INFO L87 Difference]: Start difference. First operand 240 states and 530 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:30,646 INFO L93 Difference]: Finished difference Result 259 states and 558 transitions. [2021-07-09 17:35:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:30,646 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:30,646 INFO L225 Difference]: With dead ends: 259 [2021-07-09 17:35:30,646 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 17:35:30,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 798.7ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:35:30,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 17:35:30,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2021-07-09 17:35:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-07-09 17:35:30,649 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-07-09 17:35:30,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:30,649 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-07-09 17:35:30,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:30,649 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-07-09 17:35:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:30,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:30,649 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:30,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-07-09 17:35:30,850 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:30,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:30,850 INFO L82 PathProgramCache]: Analyzing trace with hash -409421085, now seen corresponding path program 543 times [2021-07-09 17:35:30,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:30,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848142717] [2021-07-09 17:35:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:31,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:31,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848142717] [2021-07-09 17:35:31,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848142717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:31,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802611382] [2021-07-09 17:35:31,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:31,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:35:31,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:31,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:35:31,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:31,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802611382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:31,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:31,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:31,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159383563] [2021-07-09 17:35:31,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:31,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:31,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:31,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:31,488 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:31,977 INFO L93 Difference]: Finished difference Result 258 states and 557 transitions. [2021-07-09 17:35:31,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:31,978 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:31,978 INFO L225 Difference]: With dead ends: 258 [2021-07-09 17:35:31,978 INFO L226 Difference]: Without dead ends: 245 [2021-07-09 17:35:31,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 780.6ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:35:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-09 17:35:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-07-09 17:35:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-07-09 17:35:31,980 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-07-09 17:35:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:31,980 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-07-09 17:35:31,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-07-09 17:35:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:31,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:31,981 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:32,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4200 [2021-07-09 17:35:32,181 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:32,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:32,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1986762815, now seen corresponding path program 544 times [2021-07-09 17:35:32,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:32,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246487226] [2021-07-09 17:35:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:32,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:32,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246487226] [2021-07-09 17:35:32,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246487226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:32,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592319873] [2021-07-09 17:35:32,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:32,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:32,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:32,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:32,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:32,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592319873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:32,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:32,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:32,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424970416] [2021-07-09 17:35:32,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:32,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:32,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:32,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:32,893 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:34,467 INFO L93 Difference]: Finished difference Result 317 states and 664 transitions. [2021-07-09 17:35:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:35:34,467 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:34,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:34,467 INFO L225 Difference]: With dead ends: 317 [2021-07-09 17:35:34,468 INFO L226 Difference]: Without dead ends: 299 [2021-07-09 17:35:34,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1795.1ms TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:35:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-07-09 17:35:34,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 240. [2021-07-09 17:35:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.217573221757322) internal successors, (530), 239 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-07-09 17:35:34,470 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-07-09 17:35:34,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:34,470 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-07-09 17:35:34,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-07-09 17:35:34,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:34,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:34,471 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:34,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4214 [2021-07-09 17:35:34,671 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1288305703, now seen corresponding path program 545 times [2021-07-09 17:35:34,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:34,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386950788] [2021-07-09 17:35:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:34,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:34,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386950788] [2021-07-09 17:35:34,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386950788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:34,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014722107] [2021-07-09 17:35:34,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:34,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:35:34,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:34,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:34,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:35,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014722107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:35,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:35,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:35,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163685602] [2021-07-09 17:35:35,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:35,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:35,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:35,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:35,226 INFO L87 Difference]: Start difference. First operand 240 states and 530 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:35,962 INFO L93 Difference]: Finished difference Result 297 states and 623 transitions. [2021-07-09 17:35:35,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:35:35,963 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:35,963 INFO L225 Difference]: With dead ends: 297 [2021-07-09 17:35:35,963 INFO L226 Difference]: Without dead ends: 281 [2021-07-09 17:35:35,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 865.0ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:35:35,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-09 17:35:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 237. [2021-07-09 17:35:35,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.2161016949152543) internal successors, (523), 236 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 523 transitions. [2021-07-09 17:35:35,965 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 523 transitions. Word has length 20 [2021-07-09 17:35:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:35,965 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 523 transitions. [2021-07-09 17:35:35,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 523 transitions. [2021-07-09 17:35:35,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:35,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:35,966 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:36,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4226,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:36,166 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:36,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:36,166 INFO L82 PathProgramCache]: Analyzing trace with hash -625098845, now seen corresponding path program 546 times [2021-07-09 17:35:36,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:36,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428436589] [2021-07-09 17:35:36,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:36,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:36,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428436589] [2021-07-09 17:35:36,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428436589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:36,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006351787] [2021-07-09 17:35:36,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:36,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:35:36,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:36,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 17:35:36,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:36,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006351787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:36,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:36,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:36,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380848670] [2021-07-09 17:35:36,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:36,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:36,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:36,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:36,786 INFO L87 Difference]: Start difference. First operand 237 states and 523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:37,377 INFO L93 Difference]: Finished difference Result 281 states and 589 transitions. [2021-07-09 17:35:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:35:37,378 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:37,378 INFO L225 Difference]: With dead ends: 281 [2021-07-09 17:35:37,378 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:35:37,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 829.4ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:35:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:35:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2021-07-09 17:35:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-07-09 17:35:37,381 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-07-09 17:35:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:37,381 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-07-09 17:35:37,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:37,381 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-07-09 17:35:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:37,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:37,381 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:37,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4238,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:37,582 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:37,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2092526721, now seen corresponding path program 547 times [2021-07-09 17:35:37,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:37,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766566173] [2021-07-09 17:35:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:37,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:37,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766566173] [2021-07-09 17:35:37,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766566173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:37,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733887472] [2021-07-09 17:35:37,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:37,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:37,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:38,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733887472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:38,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:38,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:38,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62058554] [2021-07-09 17:35:38,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:38,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:38,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:38,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:38,378 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:39,479 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-07-09 17:35:40,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:40,072 INFO L93 Difference]: Finished difference Result 309 states and 648 transitions. [2021-07-09 17:35:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:35:40,072 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:40,073 INFO L225 Difference]: With dead ends: 309 [2021-07-09 17:35:40,073 INFO L226 Difference]: Without dead ends: 291 [2021-07-09 17:35:40,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 2038.6ms TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:35:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-07-09 17:35:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 244. [2021-07-09 17:35:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.2263374485596708) internal successors, (541), 243 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 541 transitions. [2021-07-09 17:35:40,075 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 541 transitions. Word has length 20 [2021-07-09 17:35:40,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:40,075 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 541 transitions. [2021-07-09 17:35:40,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:40,076 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 541 transitions. [2021-07-09 17:35:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:40,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:40,076 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:40,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4252 [2021-07-09 17:35:40,276 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:40,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:40,277 INFO L82 PathProgramCache]: Analyzing trace with hash -361502979, now seen corresponding path program 548 times [2021-07-09 17:35:40,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:40,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681120748] [2021-07-09 17:35:40,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:40,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:40,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681120748] [2021-07-09 17:35:40,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681120748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:40,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066937128] [2021-07-09 17:35:40,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:40,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:40,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:40,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:40,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:40,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066937128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:40,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:40,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:40,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094518451] [2021-07-09 17:35:40,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:40,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:40,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:40,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:40,932 INFO L87 Difference]: Start difference. First operand 244 states and 541 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:42,011 INFO L93 Difference]: Finished difference Result 315 states and 660 transitions. [2021-07-09 17:35:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:35:42,012 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:42,012 INFO L225 Difference]: With dead ends: 315 [2021-07-09 17:35:42,012 INFO L226 Difference]: Without dead ends: 296 [2021-07-09 17:35:42,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1313.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:35:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-09 17:35:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 247. [2021-07-09 17:35:42,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.227642276422764) internal successors, (548), 246 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 548 transitions. [2021-07-09 17:35:42,014 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 548 transitions. Word has length 20 [2021-07-09 17:35:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:42,014 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 548 transitions. [2021-07-09 17:35:42,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:42,015 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 548 transitions. [2021-07-09 17:35:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:42,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:42,015 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:42,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4264,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:42,215 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:42,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:42,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1115738049, now seen corresponding path program 549 times [2021-07-09 17:35:42,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:42,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367948592] [2021-07-09 17:35:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:42,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:42,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367948592] [2021-07-09 17:35:42,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367948592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:42,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596359616] [2021-07-09 17:35:42,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:42,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:42,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:42,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 17:35:42,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:42,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596359616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:42,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:42,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:42,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049149943] [2021-07-09 17:35:42,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:42,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:42,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:42,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:42,832 INFO L87 Difference]: Start difference. First operand 247 states and 548 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:43,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:43,563 INFO L93 Difference]: Finished difference Result 296 states and 631 transitions. [2021-07-09 17:35:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:35:43,563 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:43,564 INFO L225 Difference]: With dead ends: 296 [2021-07-09 17:35:43,564 INFO L226 Difference]: Without dead ends: 278 [2021-07-09 17:35:43,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 912.0ms TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:35:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-09 17:35:43,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 251. [2021-07-09 17:35:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.224) internal successors, (556), 250 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 556 transitions. [2021-07-09 17:35:43,566 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 556 transitions. Word has length 20 [2021-07-09 17:35:43,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:43,566 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 556 transitions. [2021-07-09 17:35:43,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:43,566 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 556 transitions. [2021-07-09 17:35:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:43,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:43,567 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:43,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4277 [2021-07-09 17:35:43,767 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:43,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:43,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1912473801, now seen corresponding path program 550 times [2021-07-09 17:35:43,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:43,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559043688] [2021-07-09 17:35:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:43,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:43,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559043688] [2021-07-09 17:35:43,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559043688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:43,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049962448] [2021-07-09 17:35:43,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:43,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:43,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:43,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:43,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:44,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049962448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:44,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:44,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:44,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828361803] [2021-07-09 17:35:44,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:44,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:44,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:44,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:44,300 INFO L87 Difference]: Start difference. First operand 251 states and 556 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:45,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:45,909 INFO L93 Difference]: Finished difference Result 357 states and 733 transitions. [2021-07-09 17:35:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:35:45,909 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:45,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:45,910 INFO L225 Difference]: With dead ends: 357 [2021-07-09 17:35:45,910 INFO L226 Difference]: Without dead ends: 314 [2021-07-09 17:35:45,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1650.1ms TimeCoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:35:45,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-07-09 17:35:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 254. [2021-07-09 17:35:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.225296442687747) internal successors, (563), 253 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 563 transitions. [2021-07-09 17:35:45,912 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 563 transitions. Word has length 20 [2021-07-09 17:35:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:45,913 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 563 transitions. [2021-07-09 17:35:45,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:45,913 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 563 transitions. [2021-07-09 17:35:45,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:45,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:45,913 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:46,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4291,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:46,113 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:46,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:46,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1876147229, now seen corresponding path program 551 times [2021-07-09 17:35:46,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:46,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442303077] [2021-07-09 17:35:46,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:46,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:46,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442303077] [2021-07-09 17:35:46,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442303077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:46,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595346092] [2021-07-09 17:35:46,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:46,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:35:46,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:46,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:46,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:46,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595346092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:46,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:46,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:46,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287814518] [2021-07-09 17:35:46,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:46,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:46,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:46,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:46,755 INFO L87 Difference]: Start difference. First operand 254 states and 563 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:47,702 INFO L93 Difference]: Finished difference Result 332 states and 704 transitions. [2021-07-09 17:35:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:35:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:47,702 INFO L225 Difference]: With dead ends: 332 [2021-07-09 17:35:47,702 INFO L226 Difference]: Without dead ends: 313 [2021-07-09 17:35:47,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1089.2ms TimeCoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:35:47,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-07-09 17:35:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 256. [2021-07-09 17:35:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-07-09 17:35:47,705 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-07-09 17:35:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:47,705 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-07-09 17:35:47,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:47,705 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-07-09 17:35:47,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:47,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:47,706 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:47,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:47,906 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:47,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:47,906 INFO L82 PathProgramCache]: Analyzing trace with hash -500831717, now seen corresponding path program 552 times [2021-07-09 17:35:47,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:47,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067107476] [2021-07-09 17:35:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:48,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:48,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067107476] [2021-07-09 17:35:48,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067107476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:48,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397098794] [2021-07-09 17:35:48,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:48,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:35:48,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:48,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:48,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:48,449 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 17:35:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:48,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397098794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:48,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:48,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:48,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398635236] [2021-07-09 17:35:48,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:48,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:48,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:48,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:48,647 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:49,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:49,064 INFO L93 Difference]: Finished difference Result 275 states and 597 transitions. [2021-07-09 17:35:49,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:35:49,064 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:49,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:49,064 INFO L225 Difference]: With dead ends: 275 [2021-07-09 17:35:49,064 INFO L226 Difference]: Without dead ends: 260 [2021-07-09 17:35:49,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 817.2ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:35:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-09 17:35:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2021-07-09 17:35:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.23046875) internal successors, (571), 256 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 571 transitions. [2021-07-09 17:35:49,067 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 571 transitions. Word has length 20 [2021-07-09 17:35:49,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:49,067 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 571 transitions. [2021-07-09 17:35:49,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 571 transitions. [2021-07-09 17:35:49,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:49,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:49,067 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:49,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4317,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:49,268 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:49,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:49,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2141182205, now seen corresponding path program 553 times [2021-07-09 17:35:49,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:49,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481012428] [2021-07-09 17:35:49,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:49,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:49,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481012428] [2021-07-09 17:35:49,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481012428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:49,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098535086] [2021-07-09 17:35:49,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:49,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:49,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:49,826 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-09 17:35:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:50,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098535086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:50,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:50,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:50,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777702830] [2021-07-09 17:35:50,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:50,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:50,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:50,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:50,045 INFO L87 Difference]: Start difference. First operand 257 states and 571 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:50,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:50,471 INFO L93 Difference]: Finished difference Result 274 states and 596 transitions. [2021-07-09 17:35:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:35:50,471 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:50,472 INFO L225 Difference]: With dead ends: 274 [2021-07-09 17:35:50,472 INFO L226 Difference]: Without dead ends: 261 [2021-07-09 17:35:50,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 860.4ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:35:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-09 17:35:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2021-07-09 17:35:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.2295719844357977) internal successors, (573), 257 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 573 transitions. [2021-07-09 17:35:50,474 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 573 transitions. Word has length 20 [2021-07-09 17:35:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:50,474 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 573 transitions. [2021-07-09 17:35:50,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 573 transitions. [2021-07-09 17:35:50,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:50,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:50,475 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:50,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4329 [2021-07-09 17:35:50,675 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:50,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:50,675 INFO L82 PathProgramCache]: Analyzing trace with hash 563840475, now seen corresponding path program 554 times [2021-07-09 17:35:50,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:50,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994166369] [2021-07-09 17:35:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:50,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:50,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994166369] [2021-07-09 17:35:50,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994166369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:50,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672634169] [2021-07-09 17:35:50,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:50,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:50,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:50,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:50,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:51,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672634169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:51,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:51,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:51,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632339177] [2021-07-09 17:35:51,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:51,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:51,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:51,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:51,489 INFO L87 Difference]: Start difference. First operand 258 states and 573 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:52,299 INFO L93 Difference]: Finished difference Result 299 states and 640 transitions. [2021-07-09 17:35:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:35:52,299 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:52,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:52,299 INFO L225 Difference]: With dead ends: 299 [2021-07-09 17:35:52,299 INFO L226 Difference]: Without dead ends: 281 [2021-07-09 17:35:52,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1149.8ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:35:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-09 17:35:52,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 256. [2021-07-09 17:35:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:52,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-07-09 17:35:52,302 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-07-09 17:35:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:52,302 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-07-09 17:35:52,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-07-09 17:35:52,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:52,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:52,302 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:52,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4341,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:52,503 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:52,503 INFO L82 PathProgramCache]: Analyzing trace with hash 658047267, now seen corresponding path program 555 times [2021-07-09 17:35:52,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:52,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827856964] [2021-07-09 17:35:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:52,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:52,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827856964] [2021-07-09 17:35:52,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827856964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:52,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269381043] [2021-07-09 17:35:52,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:52,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:35:52,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:52,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:52,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:53,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269381043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:53,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:53,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:53,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081247634] [2021-07-09 17:35:53,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:53,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:53,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:53,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:53,216 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:53,776 INFO L93 Difference]: Finished difference Result 284 states and 611 transitions. [2021-07-09 17:35:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:35:53,776 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:53,776 INFO L225 Difference]: With dead ends: 284 [2021-07-09 17:35:53,777 INFO L226 Difference]: Without dead ends: 277 [2021-07-09 17:35:53,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 896.3ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:35:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-09 17:35:53,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 257. [2021-07-09 17:35:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.234375) internal successors, (572), 256 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 572 transitions. [2021-07-09 17:35:53,779 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 572 transitions. Word has length 20 [2021-07-09 17:35:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:53,779 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 572 transitions. [2021-07-09 17:35:53,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 572 transitions. [2021-07-09 17:35:53,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:53,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:53,779 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:53,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4353 [2021-07-09 17:35:53,980 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:53,980 INFO L82 PathProgramCache]: Analyzing trace with hash -919294463, now seen corresponding path program 556 times [2021-07-09 17:35:53,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:53,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702437653] [2021-07-09 17:35:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:54,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:54,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702437653] [2021-07-09 17:35:54,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702437653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:54,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687906909] [2021-07-09 17:35:54,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:54,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:54,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:54,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:54,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:54,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687906909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:54,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:54,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:54,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092321872] [2021-07-09 17:35:54,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:54,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:54,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:54,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:54,719 INFO L87 Difference]: Start difference. First operand 257 states and 572 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:55,715 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-07-09 17:35:55,874 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-07-09 17:35:56,038 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-07-09 17:35:56,411 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-07-09 17:35:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:56,443 INFO L93 Difference]: Finished difference Result 322 states and 680 transitions. [2021-07-09 17:35:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:35:56,444 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:56,444 INFO L225 Difference]: With dead ends: 322 [2021-07-09 17:35:56,444 INFO L226 Difference]: Without dead ends: 298 [2021-07-09 17:35:56,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2017.2ms TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:35:56,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-07-09 17:35:56,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 256. [2021-07-09 17:35:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-07-09 17:35:56,447 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-07-09 17:35:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:56,447 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-07-09 17:35:56,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-07-09 17:35:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:56,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:56,447 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:56,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4368,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:56,647 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:56,648 INFO L82 PathProgramCache]: Analyzing trace with hash -412948197, now seen corresponding path program 557 times [2021-07-09 17:35:56,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:56,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298803671] [2021-07-09 17:35:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:56,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:56,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298803671] [2021-07-09 17:35:56,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298803671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:56,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766031847] [2021-07-09 17:35:56,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:56,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:35:56,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:56,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:35:56,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:57,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766031847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:57,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:57,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:35:57,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945987194] [2021-07-09 17:35:57,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:35:57,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:57,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:35:57,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:35:57,401 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:58,272 INFO L93 Difference]: Finished difference Result 318 states and 667 transitions. [2021-07-09 17:35:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:35:58,272 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:35:58,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:58,273 INFO L225 Difference]: With dead ends: 318 [2021-07-09 17:35:58,273 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 17:35:58,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1214.7ms TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:35:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 17:35:58,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 256. [2021-07-09 17:35:58,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-07-09 17:35:58,275 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-07-09 17:35:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:58,275 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-07-09 17:35:58,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-07-09 17:35:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:35:58,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:58,276 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:58,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4380,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:58,476 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:58,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1753934048, now seen corresponding path program 558 times [2021-07-09 17:35:58,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:58,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362970564] [2021-07-09 17:35:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:35:58,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:58,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362970564] [2021-07-09 17:35:58,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362970564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:58,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294917968] [2021-07-09 17:35:58,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:58,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:35:58,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:58,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:35:58,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:58,956 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 17:35:58,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-07-09 17:35:58,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,968 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 17:35:58,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-07-09 17:35:58,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,977 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:58,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:35:58,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,984 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:58,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:58,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:58,995 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 17:35:58,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-07-09 17:35:58,996 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,003 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 17:35:59,004 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:35:59,010 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,017 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 17:35:59,017 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,023 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,039 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,040 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,048 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,049 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:35:59,055 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,061 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,062 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,067 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,075 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:35:59,077 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,083 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 17:35:59,084 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:35:59,089 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:35:59,094 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,101 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,102 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,108 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 17:35:59,109 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,115 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 17:35:59,116 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,123 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,123 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,130 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,130 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,136 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,137 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:35:59,142 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,149 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:35:59,150 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,156 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:35:59,157 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:35:59,162 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:35:59,179 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,186 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:35:59,186 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:59,190 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,197 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:35:59,198 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,204 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:35:59,204 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:59,208 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,214 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 17:35:59,214 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-07-09 17:35:59,219 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,225 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 17:35:59,226 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,232 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 17:35:59,233 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,235 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:59,236 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,241 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:59,245 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:59,249 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,256 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,257 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,262 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,263 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,269 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:35:59,269 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,275 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 17:35:59,276 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:59,279 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,284 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 17:35:59,285 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,289 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,295 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 17:35:59,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 17:35:59,295 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,299 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:59,302 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:35:59,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-07-09 17:35:59,306 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:35:59,309 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:59,371 INFO L628 ElimStorePlain]: treesize reduction 117, result has 34.6 percent of original size [2021-07-09 17:35:59,371 INFO L518 ElimStorePlain]: Eliminatee scoreA vanished before elimination [2021-07-09 17:35:59,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:35:59,373 INFO L247 ElimStorePlain]: Needed 55 recursive calls to eliminate 3 variables, input treesize:2437, output treesize:44 [2021-07-09 17:35:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:59,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294917968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:59,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:59,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-09 17:35:59,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591490104] [2021-07-09 17:35:59,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:35:59,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:59,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:35:59,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:35:59,459 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:00,501 INFO L93 Difference]: Finished difference Result 367 states and 764 transitions. [2021-07-09 17:36:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:36:00,501 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:00,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:00,502 INFO L225 Difference]: With dead ends: 367 [2021-07-09 17:36:00,502 INFO L226 Difference]: Without dead ends: 365 [2021-07-09 17:36:00,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1137.3ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:36:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-07-09 17:36:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 281. [2021-07-09 17:36:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-07-09 17:36:00,505 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-07-09 17:36:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:00,505 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-07-09 17:36:00,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-07-09 17:36:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:00,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:00,505 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:00,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4392 [2021-07-09 17:36:00,706 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:00,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:00,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1878238050, now seen corresponding path program 559 times [2021-07-09 17:36:00,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:00,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998313308] [2021-07-09 17:36:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:36:00,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:00,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998313308] [2021-07-09 17:36:00,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998313308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:00,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493564815] [2021-07-09 17:36:00,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:00,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:36:00,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:36:01,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493564815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:01,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:01,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:01,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913971443] [2021-07-09 17:36:01,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:01,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:01,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:01,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:01,005 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:01,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:01,373 INFO L93 Difference]: Finished difference Result 319 states and 697 transitions. [2021-07-09 17:36:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:01,373 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:01,374 INFO L225 Difference]: With dead ends: 319 [2021-07-09 17:36:01,374 INFO L226 Difference]: Without dead ends: 316 [2021-07-09 17:36:01,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:36:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-09 17:36:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 281. [2021-07-09 17:36:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2357142857142858) internal successors, (626), 280 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 626 transitions. [2021-07-09 17:36:01,377 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 626 transitions. Word has length 20 [2021-07-09 17:36:01,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:01,377 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 626 transitions. [2021-07-09 17:36:01,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:01,377 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 626 transitions. [2021-07-09 17:36:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:01,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:01,377 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:01,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4450 [2021-07-09 17:36:01,578 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:01,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:01,578 INFO L82 PathProgramCache]: Analyzing trace with hash 383787555, now seen corresponding path program 560 times [2021-07-09 17:36:01,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:01,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348196563] [2021-07-09 17:36:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:01,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:01,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348196563] [2021-07-09 17:36:01,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348196563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:01,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287157325] [2021-07-09 17:36:01,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:01,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:01,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:01,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:36:01,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:02,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287157325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:02,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:02,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:02,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778877977] [2021-07-09 17:36:02,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:02,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:02,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:02,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:02,151 INFO L87 Difference]: Start difference. First operand 281 states and 626 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:02,720 INFO L93 Difference]: Finished difference Result 333 states and 719 transitions. [2021-07-09 17:36:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:36:02,720 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:02,720 INFO L225 Difference]: With dead ends: 333 [2021-07-09 17:36:02,720 INFO L226 Difference]: Without dead ends: 312 [2021-07-09 17:36:02,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 767.7ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:36:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-07-09 17:36:02,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-07-09 17:36:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2367491166077738) internal successors, (633), 283 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-07-09 17:36:02,723 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-07-09 17:36:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:02,723 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-07-09 17:36:02,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-07-09 17:36:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:02,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:02,724 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:02,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4458,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:02,924 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:02,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:02,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1682754045, now seen corresponding path program 561 times [2021-07-09 17:36:02,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:02,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003892119] [2021-07-09 17:36:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:03,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:03,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003892119] [2021-07-09 17:36:03,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003892119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:03,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689793866] [2021-07-09 17:36:03,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:03,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:36:03,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:03,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:36:03,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:03,419 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:36:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:03,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689793866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:03,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:03,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:03,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127480470] [2021-07-09 17:36:03,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:03,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:03,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:03,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:03,595 INFO L87 Difference]: Start difference. First operand 284 states and 633 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:04,491 INFO L93 Difference]: Finished difference Result 338 states and 718 transitions. [2021-07-09 17:36:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:36:04,492 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:04,492 INFO L225 Difference]: With dead ends: 338 [2021-07-09 17:36:04,492 INFO L226 Difference]: Without dead ends: 312 [2021-07-09 17:36:04,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1079.2ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:36:04,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-07-09 17:36:04,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 285. [2021-07-09 17:36:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.23943661971831) internal successors, (636), 284 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 636 transitions. [2021-07-09 17:36:04,495 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 636 transitions. Word has length 20 [2021-07-09 17:36:04,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:04,495 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 636 transitions. [2021-07-09 17:36:04,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 636 transitions. [2021-07-09 17:36:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:04,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:04,495 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:04,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4470 [2021-07-09 17:36:04,696 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:04,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:04,696 INFO L82 PathProgramCache]: Analyzing trace with hash 854508981, now seen corresponding path program 562 times [2021-07-09 17:36:04,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:04,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765617772] [2021-07-09 17:36:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:04,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:04,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765617772] [2021-07-09 17:36:04,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765617772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:04,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497223382] [2021-07-09 17:36:04,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:04,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:04,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:04,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:04,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:05,212 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:36:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:05,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497223382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:05,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:05,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:05,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127576390] [2021-07-09 17:36:05,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:05,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:05,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:05,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:05,325 INFO L87 Difference]: Start difference. First operand 285 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:06,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:06,066 INFO L93 Difference]: Finished difference Result 330 states and 713 transitions. [2021-07-09 17:36:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:36:06,066 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:06,067 INFO L225 Difference]: With dead ends: 330 [2021-07-09 17:36:06,067 INFO L226 Difference]: Without dead ends: 312 [2021-07-09 17:36:06,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1000.4ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:36:06,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-07-09 17:36:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-07-09 17:36:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2367491166077738) internal successors, (633), 283 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-07-09 17:36:06,070 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-07-09 17:36:06,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:06,070 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-07-09 17:36:06,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:06,070 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-07-09 17:36:06,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:06,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:06,070 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:06,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4483 [2021-07-09 17:36:06,271 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:06,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:06,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1651244733, now seen corresponding path program 563 times [2021-07-09 17:36:06,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:06,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776848056] [2021-07-09 17:36:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:06,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:06,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776848056] [2021-07-09 17:36:06,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776848056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:06,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160899141] [2021-07-09 17:36:06,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:06,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:36:06,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:06,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:06,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:06,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160899141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:06,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:06,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:06,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656419968] [2021-07-09 17:36:06,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:06,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:06,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:06,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:06,789 INFO L87 Difference]: Start difference. First operand 284 states and 633 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:07,421 INFO L93 Difference]: Finished difference Result 347 states and 744 transitions. [2021-07-09 17:36:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:36:07,422 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:07,422 INFO L225 Difference]: With dead ends: 347 [2021-07-09 17:36:07,422 INFO L226 Difference]: Without dead ends: 328 [2021-07-09 17:36:07,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 749.2ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:36:07,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-07-09 17:36:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 285. [2021-07-09 17:36:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.23943661971831) internal successors, (636), 284 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 636 transitions. [2021-07-09 17:36:07,425 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 636 transitions. Word has length 20 [2021-07-09 17:36:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:07,425 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 636 transitions. [2021-07-09 17:36:07,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 636 transitions. [2021-07-09 17:36:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:07,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:07,425 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:07,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4495 [2021-07-09 17:36:07,626 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash 705965373, now seen corresponding path program 564 times [2021-07-09 17:36:07,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:07,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388081551] [2021-07-09 17:36:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:07,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:07,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388081551] [2021-07-09 17:36:07,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388081551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:07,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15791125] [2021-07-09 17:36:07,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:07,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:36:07,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:07,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:36:07,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:08,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15791125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:08,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:08,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:08,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747536345] [2021-07-09 17:36:08,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:08,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:08,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:08,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:08,268 INFO L87 Difference]: Start difference. First operand 285 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:09,651 INFO L93 Difference]: Finished difference Result 373 states and 780 transitions. [2021-07-09 17:36:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:36:09,651 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:09,651 INFO L225 Difference]: With dead ends: 373 [2021-07-09 17:36:09,651 INFO L226 Difference]: Without dead ends: 350 [2021-07-09 17:36:09,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1586.7ms TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:36:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-07-09 17:36:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 284. [2021-07-09 17:36:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2367491166077738) internal successors, (633), 283 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-07-09 17:36:09,654 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-07-09 17:36:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:09,654 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-07-09 17:36:09,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-07-09 17:36:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:09,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:09,655 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:09,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4507,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:09,855 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:09,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:09,855 INFO L82 PathProgramCache]: Analyzing trace with hash -671736063, now seen corresponding path program 565 times [2021-07-09 17:36:09,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:09,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325868213] [2021-07-09 17:36:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:10,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:10,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325868213] [2021-07-09 17:36:10,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325868213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:10,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609452835] [2021-07-09 17:36:10,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:10,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:10,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:10,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609452835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:10,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:10,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:10,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165120468] [2021-07-09 17:36:10,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:10,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:10,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:10,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:10,433 INFO L87 Difference]: Start difference. First operand 284 states and 633 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:11,466 INFO L93 Difference]: Finished difference Result 342 states and 726 transitions. [2021-07-09 17:36:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:36:11,466 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:11,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:11,467 INFO L225 Difference]: With dead ends: 342 [2021-07-09 17:36:11,467 INFO L226 Difference]: Without dead ends: 320 [2021-07-09 17:36:11,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1172.4ms TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:36:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-07-09 17:36:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 285. [2021-07-09 17:36:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.2359154929577465) internal successors, (635), 284 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 635 transitions. [2021-07-09 17:36:11,470 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 635 transitions. Word has length 20 [2021-07-09 17:36:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:11,470 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 635 transitions. [2021-07-09 17:36:11,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 635 transitions. [2021-07-09 17:36:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:11,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:11,470 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:11,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4520,566 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:11,670 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:11,671 INFO L82 PathProgramCache]: Analyzing trace with hash -165389797, now seen corresponding path program 566 times [2021-07-09 17:36:11,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:11,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033195729] [2021-07-09 17:36:11,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:11,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:11,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033195729] [2021-07-09 17:36:11,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033195729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:11,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814475575] [2021-07-09 17:36:11,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:11,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:11,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:11,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:11,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:12,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814475575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:12,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:12,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:12,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907301858] [2021-07-09 17:36:12,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:12,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:12,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:12,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:12,266 INFO L87 Difference]: Start difference. First operand 285 states and 635 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:13,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:13,368 INFO L93 Difference]: Finished difference Result 351 states and 744 transitions. [2021-07-09 17:36:13,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:36:13,368 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:13,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:13,368 INFO L225 Difference]: With dead ends: 351 [2021-07-09 17:36:13,369 INFO L226 Difference]: Without dead ends: 329 [2021-07-09 17:36:13,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1215.4ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:36:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-09 17:36:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 285. [2021-07-09 17:36:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.232394366197183) internal successors, (634), 284 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-07-09 17:36:13,371 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-07-09 17:36:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:13,371 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-07-09 17:36:13,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-07-09 17:36:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:13,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:13,372 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:13,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4532,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:13,585 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:13,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1732995997, now seen corresponding path program 567 times [2021-07-09 17:36:13,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:13,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585501626] [2021-07-09 17:36:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:13,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:13,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585501626] [2021-07-09 17:36:13,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585501626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:13,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052646669] [2021-07-09 17:36:13,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:13,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:13,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:13,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:13,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:14,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052646669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:14,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:14,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:14,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276984444] [2021-07-09 17:36:14,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:14,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:14,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:14,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:14,228 INFO L87 Difference]: Start difference. First operand 285 states and 634 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:14,816 INFO L93 Difference]: Finished difference Result 308 states and 677 transitions. [2021-07-09 17:36:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:36:14,816 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:14,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:14,817 INFO L225 Difference]: With dead ends: 308 [2021-07-09 17:36:14,817 INFO L226 Difference]: Without dead ends: 295 [2021-07-09 17:36:14,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 851.7ms TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:36:14,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-07-09 17:36:14,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 286. [2021-07-09 17:36:14,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.231578947368421) internal successors, (636), 285 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 636 transitions. [2021-07-09 17:36:14,820 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 636 transitions. Word has length 20 [2021-07-09 17:36:14,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:14,820 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 636 transitions. [2021-07-09 17:36:14,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:14,820 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 636 transitions. [2021-07-09 17:36:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:14,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:14,820 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:15,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4544,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:15,021 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:15,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:15,021 INFO L82 PathProgramCache]: Analyzing trace with hash 984629569, now seen corresponding path program 568 times [2021-07-09 17:36:15,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:15,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809427499] [2021-07-09 17:36:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:15,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:15,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809427499] [2021-07-09 17:36:15,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809427499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:15,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902163517] [2021-07-09 17:36:15,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:15,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:15,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:15,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:15,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:15,589 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:36:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:15,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902163517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:15,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:15,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:15,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287750542] [2021-07-09 17:36:15,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:15,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:15,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:15,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:15,761 INFO L87 Difference]: Start difference. First operand 286 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:16,551 INFO L93 Difference]: Finished difference Result 327 states and 703 transitions. [2021-07-09 17:36:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:36:16,552 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:16,552 INFO L225 Difference]: With dead ends: 327 [2021-07-09 17:36:16,552 INFO L226 Difference]: Without dead ends: 309 [2021-07-09 17:36:16,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1080.7ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:36:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-07-09 17:36:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 285. [2021-07-09 17:36:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.232394366197183) internal successors, (634), 284 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-07-09 17:36:16,555 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-07-09 17:36:16,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:16,555 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-07-09 17:36:16,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:16,555 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-07-09 17:36:16,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:16,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:16,555 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:16,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4556 [2021-07-09 17:36:16,755 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:16,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1490975835, now seen corresponding path program 569 times [2021-07-09 17:36:16,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:16,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533080855] [2021-07-09 17:36:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:17,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:17,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533080855] [2021-07-09 17:36:17,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533080855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:17,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009312251] [2021-07-09 17:36:17,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:17,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:36:17,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:17,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:36:17,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:17,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009312251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:17,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:17,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:17,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174536699] [2021-07-09 17:36:17,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:17,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:17,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:17,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:17,454 INFO L87 Difference]: Start difference. First operand 285 states and 634 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:18,481 INFO L93 Difference]: Finished difference Result 337 states and 716 transitions. [2021-07-09 17:36:18,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:36:18,482 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:18,482 INFO L225 Difference]: With dead ends: 337 [2021-07-09 17:36:18,482 INFO L226 Difference]: Without dead ends: 323 [2021-07-09 17:36:18,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1280.6ms TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:36:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-09 17:36:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 285. [2021-07-09 17:36:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.232394366197183) internal successors, (634), 284 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-07-09 17:36:18,485 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-07-09 17:36:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:18,485 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-07-09 17:36:18,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-07-09 17:36:18,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:18,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:18,485 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:18,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4568,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:18,686 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:18,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:18,686 INFO L82 PathProgramCache]: Analyzing trace with hash -637109216, now seen corresponding path program 570 times [2021-07-09 17:36:18,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:18,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305352275] [2021-07-09 17:36:18,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:36:18,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:18,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305352275] [2021-07-09 17:36:18,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305352275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:18,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964679792] [2021-07-09 17:36:18,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:18,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:18,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:18,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:36:18,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:36:19,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964679792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:19,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:19,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 17:36:19,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658139087] [2021-07-09 17:36:19,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:36:19,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:19,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:36:19,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:36:19,074 INFO L87 Difference]: Start difference. First operand 285 states and 634 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:19,308 INFO L93 Difference]: Finished difference Result 304 states and 670 transitions. [2021-07-09 17:36:19,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:36:19,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:19,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:19,309 INFO L225 Difference]: With dead ends: 304 [2021-07-09 17:36:19,309 INFO L226 Difference]: Without dead ends: 302 [2021-07-09 17:36:19,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-07-09 17:36:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 281. [2021-07-09 17:36:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-07-09 17:36:19,312 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-07-09 17:36:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:19,312 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-07-09 17:36:19,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-07-09 17:36:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:19,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:19,312 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:19,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4585 [2021-07-09 17:36:19,513 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:19,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:19,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2007255709, now seen corresponding path program 571 times [2021-07-09 17:36:19,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:19,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529141879] [2021-07-09 17:36:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:19,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:19,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529141879] [2021-07-09 17:36:19,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529141879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:19,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264017851] [2021-07-09 17:36:19,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:19,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:19,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:20,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264017851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:20,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:20,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:20,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519044889] [2021-07-09 17:36:20,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:20,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:20,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:20,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:20,043 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:20,795 INFO L93 Difference]: Finished difference Result 345 states and 740 transitions. [2021-07-09 17:36:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:36:20,796 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:20,796 INFO L225 Difference]: With dead ends: 345 [2021-07-09 17:36:20,796 INFO L226 Difference]: Without dead ends: 326 [2021-07-09 17:36:20,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 920.2ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:36:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-09 17:36:20,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2021-07-09 17:36:20,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-07-09 17:36:20,799 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-07-09 17:36:20,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:20,799 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-07-09 17:36:20,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:20,799 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-07-09 17:36:20,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:20,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:20,799 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:20,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4595 [2021-07-09 17:36:21,000 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:21,000 INFO L82 PathProgramCache]: Analyzing trace with hash 7840897, now seen corresponding path program 572 times [2021-07-09 17:36:21,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:21,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950471318] [2021-07-09 17:36:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:21,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:21,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950471318] [2021-07-09 17:36:21,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950471318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:21,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513471117] [2021-07-09 17:36:21,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:21,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:21,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:21,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:36:21,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:21,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513471117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:21,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:21,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:21,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208905467] [2021-07-09 17:36:21,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:21,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:21,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:21,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:21,625 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:22,271 INFO L93 Difference]: Finished difference Result 336 states and 729 transitions. [2021-07-09 17:36:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:36:22,272 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:22,272 INFO L225 Difference]: With dead ends: 336 [2021-07-09 17:36:22,272 INFO L226 Difference]: Without dead ends: 318 [2021-07-09 17:36:22,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 874.8ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:36:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-07-09 17:36:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 282. [2021-07-09 17:36:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.2419928825622777) internal successors, (630), 281 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:22,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 630 transitions. [2021-07-09 17:36:22,275 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 630 transitions. Word has length 20 [2021-07-09 17:36:22,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:22,275 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 630 transitions. [2021-07-09 17:36:22,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 630 transitions. [2021-07-09 17:36:22,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:22,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:22,275 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:22,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4607,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:22,476 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:22,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:22,476 INFO L82 PathProgramCache]: Analyzing trace with hash 691347580, now seen corresponding path program 573 times [2021-07-09 17:36:22,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:22,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521160080] [2021-07-09 17:36:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:36:22,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:22,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521160080] [2021-07-09 17:36:22,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521160080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:22,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635433122] [2021-07-09 17:36:22,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:22,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:36:22,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:22,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:36:22,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:36:22,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635433122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:22,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:22,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:36:22,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658173370] [2021-07-09 17:36:22,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:36:22,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:22,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:36:22,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:36:22,857 INFO L87 Difference]: Start difference. First operand 282 states and 630 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:23,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:23,111 INFO L93 Difference]: Finished difference Result 298 states and 660 transitions. [2021-07-09 17:36:23,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:36:23,112 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:23,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:23,112 INFO L225 Difference]: With dead ends: 298 [2021-07-09 17:36:23,112 INFO L226 Difference]: Without dead ends: 298 [2021-07-09 17:36:23,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:36:23,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-07-09 17:36:23,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 281. [2021-07-09 17:36:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-07-09 17:36:23,115 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-07-09 17:36:23,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:23,115 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-07-09 17:36:23,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-07-09 17:36:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:23,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:23,115 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:23,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4619 [2021-07-09 17:36:23,316 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:23,316 INFO L82 PathProgramCache]: Analyzing trace with hash 804576649, now seen corresponding path program 574 times [2021-07-09 17:36:23,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:23,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91628938] [2021-07-09 17:36:23,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:23,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:23,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91628938] [2021-07-09 17:36:23,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91628938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:23,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145659547] [2021-07-09 17:36:23,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:23,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:23,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:23,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:23,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:23,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145659547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:23,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:23,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:23,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534740168] [2021-07-09 17:36:23,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:23,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:23,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:23,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:23,847 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:25,055 INFO L93 Difference]: Finished difference Result 365 states and 762 transitions. [2021-07-09 17:36:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:36:25,056 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:25,056 INFO L225 Difference]: With dead ends: 365 [2021-07-09 17:36:25,056 INFO L226 Difference]: Without dead ends: 322 [2021-07-09 17:36:25,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1326.0ms TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:36:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-09 17:36:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 282. [2021-07-09 17:36:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.2384341637010676) internal successors, (629), 281 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 629 transitions. [2021-07-09 17:36:25,059 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 629 transitions. Word has length 20 [2021-07-09 17:36:25,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:25,059 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 629 transitions. [2021-07-09 17:36:25,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 629 transitions. [2021-07-09 17:36:25,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:25,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:25,060 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:25,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4627,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:25,260 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:25,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:25,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1310922915, now seen corresponding path program 575 times [2021-07-09 17:36:25,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:25,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698292153] [2021-07-09 17:36:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:25,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:25,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698292153] [2021-07-09 17:36:25,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698292153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:25,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723632524] [2021-07-09 17:36:25,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:25,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:36:25,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:25,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:36:25,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:25,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723632524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:25,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:25,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:25,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622287293] [2021-07-09 17:36:25,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:25,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:25,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:25,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:25,861 INFO L87 Difference]: Start difference. First operand 282 states and 629 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:26,618 INFO L93 Difference]: Finished difference Result 351 states and 752 transitions. [2021-07-09 17:36:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:36:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:26,618 INFO L225 Difference]: With dead ends: 351 [2021-07-09 17:36:26,618 INFO L226 Difference]: Without dead ends: 332 [2021-07-09 17:36:26,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 997.7ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:36:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-09 17:36:26,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 284. [2021-07-09 17:36:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.243816254416961) internal successors, (635), 283 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 635 transitions. [2021-07-09 17:36:26,621 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 635 transitions. Word has length 20 [2021-07-09 17:36:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:26,621 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 635 transitions. [2021-07-09 17:36:26,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:26,621 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 635 transitions. [2021-07-09 17:36:26,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:26,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:26,622 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:26,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4640 [2021-07-09 17:36:26,822 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:26,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:26,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1275298075, now seen corresponding path program 576 times [2021-07-09 17:36:26,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:26,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024952255] [2021-07-09 17:36:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:27,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:27,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024952255] [2021-07-09 17:36:27,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024952255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:27,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577887690] [2021-07-09 17:36:27,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:27,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:36:27,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:27,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:36:27,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:27,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577887690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:27,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:27,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:27,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262562597] [2021-07-09 17:36:27,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:27,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:27,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:27,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:27,463 INFO L87 Difference]: Start difference. First operand 284 states and 635 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:28,088 INFO L93 Difference]: Finished difference Result 330 states and 717 transitions. [2021-07-09 17:36:28,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:36:28,088 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:28,088 INFO L225 Difference]: With dead ends: 330 [2021-07-09 17:36:28,088 INFO L226 Difference]: Without dead ends: 312 [2021-07-09 17:36:28,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 891.3ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:36:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-07-09 17:36:28,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-07-09 17:36:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.243816254416961) internal successors, (635), 283 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 635 transitions. [2021-07-09 17:36:28,091 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 635 transitions. Word has length 20 [2021-07-09 17:36:28,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:28,091 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 635 transitions. [2021-07-09 17:36:28,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 635 transitions. [2021-07-09 17:36:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:28,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:28,091 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:28,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4652,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:28,292 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:28,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2072033827, now seen corresponding path program 577 times [2021-07-09 17:36:28,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:28,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649629906] [2021-07-09 17:36:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:28,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:28,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649629906] [2021-07-09 17:36:28,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649629906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:28,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167117173] [2021-07-09 17:36:28,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:28,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:28,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:28,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167117173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:28,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:28,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:28,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269490435] [2021-07-09 17:36:28,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:28,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:28,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:28,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:28,863 INFO L87 Difference]: Start difference. First operand 284 states and 635 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:29,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:29,876 INFO L93 Difference]: Finished difference Result 354 states and 750 transitions. [2021-07-09 17:36:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:36:29,876 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:29,876 INFO L225 Difference]: With dead ends: 354 [2021-07-09 17:36:29,877 INFO L226 Difference]: Without dead ends: 332 [2021-07-09 17:36:29,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1141.0ms TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:36:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-09 17:36:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 285. [2021-07-09 17:36:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.242957746478873) internal successors, (637), 284 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 637 transitions. [2021-07-09 17:36:29,879 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 637 transitions. Word has length 20 [2021-07-09 17:36:29,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:29,879 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 637 transitions. [2021-07-09 17:36:29,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:29,879 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 637 transitions. [2021-07-09 17:36:29,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:29,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:29,880 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:30,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4664,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:30,080 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1716587203, now seen corresponding path program 578 times [2021-07-09 17:36:30,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:30,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052087300] [2021-07-09 17:36:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:30,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:30,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052087300] [2021-07-09 17:36:30,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052087300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:30,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623444802] [2021-07-09 17:36:30,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:30,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:30,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:30,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:36:30,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:30,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623444802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:30,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:30,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:30,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067513681] [2021-07-09 17:36:30,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:30,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:30,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:30,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:30,706 INFO L87 Difference]: Start difference. First operand 285 states and 637 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:31,378 INFO L93 Difference]: Finished difference Result 352 states and 756 transitions. [2021-07-09 17:36:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:36:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:31,378 INFO L225 Difference]: With dead ends: 352 [2021-07-09 17:36:31,378 INFO L226 Difference]: Without dead ends: 333 [2021-07-09 17:36:31,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 902.2ms TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:36:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-07-09 17:36:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 285. [2021-07-09 17:36:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.242957746478873) internal successors, (637), 284 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 637 transitions. [2021-07-09 17:36:31,381 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 637 transitions. Word has length 20 [2021-07-09 17:36:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:31,381 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 637 transitions. [2021-07-09 17:36:31,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 637 transitions. [2021-07-09 17:36:31,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:31,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:31,381 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:31,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4677,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:31,582 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:31,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:31,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1095245155, now seen corresponding path program 579 times [2021-07-09 17:36:31,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:31,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093425719] [2021-07-09 17:36:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:31,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:31,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093425719] [2021-07-09 17:36:31,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093425719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:31,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353325831] [2021-07-09 17:36:31,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:31,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:36:31,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:31,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 17:36:31,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:32,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353325831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:32,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:32,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:32,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515322156] [2021-07-09 17:36:32,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:32,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:32,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:32,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:32,245 INFO L87 Difference]: Start difference. First operand 285 states and 637 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:33,627 INFO L93 Difference]: Finished difference Result 425 states and 870 transitions. [2021-07-09 17:36:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:36:33,627 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:33,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:33,628 INFO L225 Difference]: With dead ends: 425 [2021-07-09 17:36:33,628 INFO L226 Difference]: Without dead ends: 348 [2021-07-09 17:36:33,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1612.4ms TimeCoverageRelationStatistics Valid=260, Invalid=1546, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:36:33,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-09 17:36:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 290. [2021-07-09 17:36:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.245674740484429) internal successors, (649), 289 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 649 transitions. [2021-07-09 17:36:33,631 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 649 transitions. Word has length 20 [2021-07-09 17:36:33,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:33,631 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 649 transitions. [2021-07-09 17:36:33,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 649 transitions. [2021-07-09 17:36:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:33,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:33,631 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:33,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4689,580 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:33,832 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:33,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:33,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1687729479, now seen corresponding path program 580 times [2021-07-09 17:36:33,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:33,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326050530] [2021-07-09 17:36:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:34,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:34,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326050530] [2021-07-09 17:36:34,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326050530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:34,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951338643] [2021-07-09 17:36:34,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:34,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:34,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:34,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:34,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:34,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951338643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:34,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:34,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:36:34,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757642506] [2021-07-09 17:36:34,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:36:34,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:34,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:36:34,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:34,464 INFO L87 Difference]: Start difference. First operand 290 states and 649 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:35,338 INFO L93 Difference]: Finished difference Result 336 states and 734 transitions. [2021-07-09 17:36:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:36:35,338 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:35,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:35,339 INFO L225 Difference]: With dead ends: 336 [2021-07-09 17:36:35,339 INFO L226 Difference]: Without dead ends: 329 [2021-07-09 17:36:35,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1105.2ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:36:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-09 17:36:35,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 294. [2021-07-09 17:36:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.242320819112628) internal successors, (657), 293 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-07-09 17:36:35,342 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-07-09 17:36:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:35,342 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-07-09 17:36:35,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:35,342 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-07-09 17:36:35,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:35,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:35,342 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:35,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4701,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:35,543 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:35,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:35,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1389676521, now seen corresponding path program 581 times [2021-07-09 17:36:35,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:35,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358712188] [2021-07-09 17:36:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:35,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:35,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358712188] [2021-07-09 17:36:35,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358712188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:35,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80896932] [2021-07-09 17:36:35,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:35,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:35,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:35,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:36,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80896932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:36,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:36,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:36:36,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417643159] [2021-07-09 17:36:36,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:36:36,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:36,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:36:36,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:36,248 INFO L87 Difference]: Start difference. First operand 294 states and 657 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:36,860 INFO L93 Difference]: Finished difference Result 318 states and 690 transitions. [2021-07-09 17:36:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:36:36,860 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:36,861 INFO L225 Difference]: With dead ends: 318 [2021-07-09 17:36:36,861 INFO L226 Difference]: Without dead ends: 293 [2021-07-09 17:36:36,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 969.4ms TimeCoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:36:36,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-07-09 17:36:36,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-07-09 17:36:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.243150684931507) internal successors, (655), 292 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-07-09 17:36:36,863 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-07-09 17:36:36,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:36,863 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-07-09 17:36:36,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:36,864 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-07-09 17:36:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:36,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:36,864 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:37,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4716 [2021-07-09 17:36:37,064 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:37,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:37,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1252337401, now seen corresponding path program 582 times [2021-07-09 17:36:37,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:37,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734984622] [2021-07-09 17:36:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:37,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:37,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734984622] [2021-07-09 17:36:37,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734984622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:37,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983107063] [2021-07-09 17:36:37,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:37,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:36:37,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:37,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:36:37,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:37,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983107063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:37,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:37,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:36:37,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411963244] [2021-07-09 17:36:37,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:36:37,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:37,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:36:37,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:37,900 INFO L87 Difference]: Start difference. First operand 293 states and 655 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:38,582 INFO L93 Difference]: Finished difference Result 308 states and 677 transitions. [2021-07-09 17:36:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:36:38,583 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:38,583 INFO L225 Difference]: With dead ends: 308 [2021-07-09 17:36:38,583 INFO L226 Difference]: Without dead ends: 295 [2021-07-09 17:36:38,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1161.2ms TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:36:38,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-07-09 17:36:38,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2021-07-09 17:36:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.242320819112628) internal successors, (657), 293 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-07-09 17:36:38,586 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-07-09 17:36:38,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:38,586 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-07-09 17:36:38,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:38,586 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-07-09 17:36:38,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:38,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:38,586 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:38,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4728 [2021-07-09 17:36:38,787 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:38,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:38,787 INFO L82 PathProgramCache]: Analyzing trace with hash -325004329, now seen corresponding path program 583 times [2021-07-09 17:36:38,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:38,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531454083] [2021-07-09 17:36:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:39,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:39,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531454083] [2021-07-09 17:36:39,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531454083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:39,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463670682] [2021-07-09 17:36:39,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:39,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:39,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:39,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463670682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:39,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:39,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:36:39,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796182642] [2021-07-09 17:36:39,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:36:39,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:39,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:36:39,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:39,581 INFO L87 Difference]: Start difference. First operand 294 states and 657 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:41,109 INFO L93 Difference]: Finished difference Result 342 states and 735 transitions. [2021-07-09 17:36:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:36:41,109 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:41,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:41,110 INFO L225 Difference]: With dead ends: 342 [2021-07-09 17:36:41,110 INFO L226 Difference]: Without dead ends: 321 [2021-07-09 17:36:41,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1795.4ms TimeCoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:36:41,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-09 17:36:41,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 291. [2021-07-09 17:36:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.2448275862068967) internal successors, (651), 290 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 651 transitions. [2021-07-09 17:36:41,113 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 651 transitions. Word has length 20 [2021-07-09 17:36:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:41,113 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 651 transitions. [2021-07-09 17:36:41,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:41,113 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 651 transitions. [2021-07-09 17:36:41,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:41,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:41,113 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:41,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4740,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:41,314 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:41,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:41,314 INFO L82 PathProgramCache]: Analyzing trace with hash -122219343, now seen corresponding path program 584 times [2021-07-09 17:36:41,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:41,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889128859] [2021-07-09 17:36:41,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:41,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:41,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889128859] [2021-07-09 17:36:41,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889128859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:41,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939496394] [2021-07-09 17:36:41,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:41,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:41,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:41,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:36:41,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:42,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939496394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:42,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:42,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:36:42,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184962479] [2021-07-09 17:36:42,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:36:42,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:42,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:36:42,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:42,042 INFO L87 Difference]: Start difference. First operand 291 states and 651 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:42,566 INFO L93 Difference]: Finished difference Result 308 states and 676 transitions. [2021-07-09 17:36:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:36:42,566 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:42,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:42,567 INFO L225 Difference]: With dead ends: 308 [2021-07-09 17:36:42,567 INFO L226 Difference]: Without dead ends: 293 [2021-07-09 17:36:42,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 933.8ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:36:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-07-09 17:36:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-07-09 17:36:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.243150684931507) internal successors, (655), 292 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-07-09 17:36:42,569 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-07-09 17:36:42,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:42,569 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-07-09 17:36:42,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:42,569 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-07-09 17:36:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:42,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:42,570 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:42,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4755 [2021-07-09 17:36:42,770 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:42,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1775172717, now seen corresponding path program 585 times [2021-07-09 17:36:42,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:42,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449531499] [2021-07-09 17:36:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:42,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:42,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449531499] [2021-07-09 17:36:42,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449531499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:42,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234495474] [2021-07-09 17:36:42,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:42,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:42,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:42,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:42,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:43,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234495474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:43,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:43,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:36:43,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086958455] [2021-07-09 17:36:43,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:36:43,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:43,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:36:43,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:43,402 INFO L87 Difference]: Start difference. First operand 293 states and 655 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:44,357 INFO L93 Difference]: Finished difference Result 326 states and 714 transitions. [2021-07-09 17:36:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:36:44,357 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:44,357 INFO L225 Difference]: With dead ends: 326 [2021-07-09 17:36:44,357 INFO L226 Difference]: Without dead ends: 319 [2021-07-09 17:36:44,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1143.6ms TimeCoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:36:44,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-07-09 17:36:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 294. [2021-07-09 17:36:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.2457337883959045) internal successors, (658), 293 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:44,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 658 transitions. [2021-07-09 17:36:44,360 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 658 transitions. Word has length 20 [2021-07-09 17:36:44,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:44,360 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 658 transitions. [2021-07-09 17:36:44,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 658 transitions. [2021-07-09 17:36:44,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:44,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:44,361 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:44,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4767,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:44,561 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:44,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:44,561 INFO L82 PathProgramCache]: Analyzing trace with hash 942452849, now seen corresponding path program 586 times [2021-07-09 17:36:44,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:44,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517311574] [2021-07-09 17:36:44,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:44,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:44,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517311574] [2021-07-09 17:36:44,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517311574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:44,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140739378] [2021-07-09 17:36:44,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:44,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:44,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:44,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:44,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:45,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140739378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:45,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:45,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:36:45,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355141635] [2021-07-09 17:36:45,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:36:45,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:45,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:36:45,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:45,386 INFO L87 Difference]: Start difference. First operand 294 states and 658 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:46,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:46,517 INFO L93 Difference]: Finished difference Result 347 states and 739 transitions. [2021-07-09 17:36:46,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:36:46,517 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:46,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:46,518 INFO L225 Difference]: With dead ends: 347 [2021-07-09 17:36:46,518 INFO L226 Difference]: Without dead ends: 316 [2021-07-09 17:36:46,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1462.1ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:36:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-09 17:36:46,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 292. [2021-07-09 17:36:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.2439862542955327) internal successors, (653), 291 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 653 transitions. [2021-07-09 17:36:46,521 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 653 transitions. Word has length 20 [2021-07-09 17:36:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:46,521 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 653 transitions. [2021-07-09 17:36:46,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 653 transitions. [2021-07-09 17:36:46,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:46,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:46,521 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:46,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4782 [2021-07-09 17:36:46,722 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:46,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:46,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1036659641, now seen corresponding path program 587 times [2021-07-09 17:36:46,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:46,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515115023] [2021-07-09 17:36:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:46,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:46,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515115023] [2021-07-09 17:36:46,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515115023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:46,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678733901] [2021-07-09 17:36:46,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:46,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:36:46,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:46,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:36:46,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:47,277 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:36:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:47,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678733901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:47,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:47,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:36:47,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953841304] [2021-07-09 17:36:47,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:36:47,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:47,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:36:47,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:47,439 INFO L87 Difference]: Start difference. First operand 292 states and 653 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:47,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:47,930 INFO L93 Difference]: Finished difference Result 309 states and 679 transitions. [2021-07-09 17:36:47,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:36:47,931 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:47,931 INFO L225 Difference]: With dead ends: 309 [2021-07-09 17:36:47,931 INFO L226 Difference]: Without dead ends: 296 [2021-07-09 17:36:47,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 880.7ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:36:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-09 17:36:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 294. [2021-07-09 17:36:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.242320819112628) internal successors, (657), 293 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-07-09 17:36:47,934 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-07-09 17:36:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:47,934 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-07-09 17:36:47,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-07-09 17:36:47,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:47,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:47,934 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:48,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 588 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4794 [2021-07-09 17:36:48,135 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:48,135 INFO L82 PathProgramCache]: Analyzing trace with hash -540682089, now seen corresponding path program 588 times [2021-07-09 17:36:48,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:48,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990355085] [2021-07-09 17:36:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:48,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:48,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990355085] [2021-07-09 17:36:48,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990355085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:48,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99943129] [2021-07-09 17:36:48,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:48,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:36:48,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:48,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:48,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:48,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99943129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:48,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:48,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:36:48,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904446884] [2021-07-09 17:36:48,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:36:48,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:48,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:36:48,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:48,855 INFO L87 Difference]: Start difference. First operand 294 states and 657 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:50,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:50,107 INFO L93 Difference]: Finished difference Result 342 states and 735 transitions. [2021-07-09 17:36:50,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:36:50,107 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:50,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:50,108 INFO L225 Difference]: With dead ends: 342 [2021-07-09 17:36:50,108 INFO L226 Difference]: Without dead ends: 321 [2021-07-09 17:36:50,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1519.4ms TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:36:50,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-09 17:36:50,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 293. [2021-07-09 17:36:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.243150684931507) internal successors, (655), 292 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-07-09 17:36:50,111 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-07-09 17:36:50,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:50,111 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-07-09 17:36:50,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:50,111 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-07-09 17:36:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:50,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:50,111 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:50,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4806 [2021-07-09 17:36:50,312 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:50,312 INFO L82 PathProgramCache]: Analyzing trace with hash -34335823, now seen corresponding path program 589 times [2021-07-09 17:36:50,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:50,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124520473] [2021-07-09 17:36:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:50,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:50,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124520473] [2021-07-09 17:36:50,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124520473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:50,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142819676] [2021-07-09 17:36:50,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:50,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:50,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:51,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142819676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:51,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:51,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:36:51,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730056044] [2021-07-09 17:36:51,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:36:51,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:51,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:36:51,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:51,005 INFO L87 Difference]: Start difference. First operand 293 states and 655 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:52,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:52,411 INFO L93 Difference]: Finished difference Result 388 states and 813 transitions. [2021-07-09 17:36:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:36:52,412 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:52,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:52,412 INFO L225 Difference]: With dead ends: 388 [2021-07-09 17:36:52,412 INFO L226 Difference]: Without dead ends: 363 [2021-07-09 17:36:52,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1601.6ms TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:36:52,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-07-09 17:36:52,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 297. [2021-07-09 17:36:52,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.2567567567567566) internal successors, (668), 296 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:52,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 668 transitions. [2021-07-09 17:36:52,415 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 668 transitions. Word has length 20 [2021-07-09 17:36:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:52,415 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 668 transitions. [2021-07-09 17:36:52,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 668 transitions. [2021-07-09 17:36:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:52,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:52,416 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:52,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4821 [2021-07-09 17:36:52,616 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:52,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:52,616 INFO L82 PathProgramCache]: Analyzing trace with hash 762399929, now seen corresponding path program 590 times [2021-07-09 17:36:52,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:52,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099608768] [2021-07-09 17:36:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:52,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:52,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099608768] [2021-07-09 17:36:52,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099608768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:52,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135609108] [2021-07-09 17:36:52,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:52,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:52,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:52,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:36:52,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:53,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135609108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:53,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:53,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:36:53,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312028873] [2021-07-09 17:36:53,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:36:53,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:53,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:36:53,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:36:53,367 INFO L87 Difference]: Start difference. First operand 297 states and 668 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:54,073 INFO L93 Difference]: Finished difference Result 364 states and 787 transitions. [2021-07-09 17:36:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:36:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:54,073 INFO L225 Difference]: With dead ends: 364 [2021-07-09 17:36:54,073 INFO L226 Difference]: Without dead ends: 345 [2021-07-09 17:36:54,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 836.1ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:36:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-09 17:36:54,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 297. [2021-07-09 17:36:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.2567567567567566) internal successors, (668), 296 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 668 transitions. [2021-07-09 17:36:54,076 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 668 transitions. Word has length 20 [2021-07-09 17:36:54,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:54,076 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 668 transitions. [2021-07-09 17:36:54,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 668 transitions. [2021-07-09 17:36:54,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:54,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:54,077 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:54,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4833,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:54,277 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:54,277 INFO L82 PathProgramCache]: Analyzing trace with hash 514247511, now seen corresponding path program 591 times [2021-07-09 17:36:54,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:54,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168993378] [2021-07-09 17:36:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:54,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:54,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168993378] [2021-07-09 17:36:54,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168993378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:54,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156824274] [2021-07-09 17:36:54,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:54,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:36:54,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:36:54,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:55,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156824274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:55,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:55,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:55,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68526312] [2021-07-09 17:36:55,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:55,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:55,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:55,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:55,038 INFO L87 Difference]: Start difference. First operand 297 states and 668 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:55,447 INFO L93 Difference]: Finished difference Result 315 states and 695 transitions. [2021-07-09 17:36:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:36:55,447 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:55,448 INFO L225 Difference]: With dead ends: 315 [2021-07-09 17:36:55,448 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 17:36:55,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 846.0ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:36:55,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 17:36:55,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-07-09 17:36:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.254180602006689) internal successors, (674), 299 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 674 transitions. [2021-07-09 17:36:55,450 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 674 transitions. Word has length 20 [2021-07-09 17:36:55,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:55,451 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 674 transitions. [2021-07-09 17:36:55,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 674 transitions. [2021-07-09 17:36:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:55,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:55,451 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:55,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4845 [2021-07-09 17:36:55,665 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:55,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1138705863, now seen corresponding path program 592 times [2021-07-09 17:36:55,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:55,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660108560] [2021-07-09 17:36:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:55,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:55,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660108560] [2021-07-09 17:36:55,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660108560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:55,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500133341] [2021-07-09 17:36:55,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:55,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:55,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:55,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:56,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500133341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:56,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:56,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:56,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089804531] [2021-07-09 17:36:56,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:56,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:56,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:56,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:56,364 INFO L87 Difference]: Start difference. First operand 300 states and 674 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:56,990 INFO L93 Difference]: Finished difference Result 325 states and 711 transitions. [2021-07-09 17:36:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:36:56,991 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:36:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:56,991 INFO L225 Difference]: With dead ends: 325 [2021-07-09 17:36:56,991 INFO L226 Difference]: Without dead ends: 318 [2021-07-09 17:36:56,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 970.1ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:36:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-07-09 17:36:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 301. [2021-07-09 17:36:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.256666666666667) internal successors, (677), 300 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 677 transitions. [2021-07-09 17:36:56,994 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 677 transitions. Word has length 20 [2021-07-09 17:36:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:56,994 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 677 transitions. [2021-07-09 17:36:56,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 677 transitions. [2021-07-09 17:36:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:36:56,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:56,994 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:57,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4859,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:57,197 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:57,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1578919703, now seen corresponding path program 593 times [2021-07-09 17:36:57,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:57,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773062188] [2021-07-09 17:36:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:57,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:57,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773062188] [2021-07-09 17:36:57,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773062188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:57,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619339566] [2021-07-09 17:36:57,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:57,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:36:57,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:57,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:57,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:57,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619339566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:57,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:57,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:36:57,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64018001] [2021-07-09 17:36:57,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:36:57,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:57,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:36:57,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:36:57,966 INFO L87 Difference]: Start difference. First operand 301 states and 677 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:59,095 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2021-07-09 17:36:59,371 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2021-07-09 17:36:59,548 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2021-07-09 17:37:00,056 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-07-09 17:37:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:00,386 INFO L93 Difference]: Finished difference Result 380 states and 812 transitions. [2021-07-09 17:37:00,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:37:00,386 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:00,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:00,387 INFO L225 Difference]: With dead ends: 380 [2021-07-09 17:37:00,387 INFO L226 Difference]: Without dead ends: 356 [2021-07-09 17:37:00,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 2680.2ms TimeCoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:37:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-07-09 17:37:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 303. [2021-07-09 17:37:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.2582781456953644) internal successors, (682), 302 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 682 transitions. [2021-07-09 17:37:00,390 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 682 transitions. Word has length 20 [2021-07-09 17:37:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:00,390 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 682 transitions. [2021-07-09 17:37:00,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 682 transitions. [2021-07-09 17:37:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:00,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:00,390 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:00,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4874,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:00,591 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:00,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:00,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1381456263, now seen corresponding path program 594 times [2021-07-09 17:37:00,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:00,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658932278] [2021-07-09 17:37:00,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:00,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:00,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658932278] [2021-07-09 17:37:00,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658932278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:00,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206269365] [2021-07-09 17:37:00,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:00,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:00,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:00,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:01,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206269365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:01,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:01,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:01,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585559578] [2021-07-09 17:37:01,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:01,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:01,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:01,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:01,300 INFO L87 Difference]: Start difference. First operand 303 states and 682 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:01,894 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-07-09 17:37:02,202 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-07-09 17:37:02,484 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-07-09 17:37:02,721 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-07-09 17:37:03,084 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-07-09 17:37:03,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:03,165 INFO L93 Difference]: Finished difference Result 384 states and 824 transitions. [2021-07-09 17:37:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:37:03,165 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:03,166 INFO L225 Difference]: With dead ends: 384 [2021-07-09 17:37:03,166 INFO L226 Difference]: Without dead ends: 365 [2021-07-09 17:37:03,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2098.5ms TimeCoverageRelationStatistics Valid=248, Invalid=1558, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:37:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-07-09 17:37:03,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 299. [2021-07-09 17:37:03,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.2550335570469797) internal successors, (672), 298 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 672 transitions. [2021-07-09 17:37:03,169 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 672 transitions. Word has length 20 [2021-07-09 17:37:03,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:03,169 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 672 transitions. [2021-07-09 17:37:03,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 672 transitions. [2021-07-09 17:37:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:03,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:03,169 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:03,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4889 [2021-07-09 17:37:03,370 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:03,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:03,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1673126495, now seen corresponding path program 595 times [2021-07-09 17:37:03,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:03,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460462086] [2021-07-09 17:37:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:03,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:03,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460462086] [2021-07-09 17:37:03,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460462086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:03,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620152354] [2021-07-09 17:37:03,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:03,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:37:03,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:03,936 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:37:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:04,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620152354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:04,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:04,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:04,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988711446] [2021-07-09 17:37:04,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:04,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:04,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:04,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:04,085 INFO L87 Difference]: Start difference. First operand 299 states and 672 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:04,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:04,498 INFO L93 Difference]: Finished difference Result 314 states and 694 transitions. [2021-07-09 17:37:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:04,498 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:04,499 INFO L225 Difference]: With dead ends: 314 [2021-07-09 17:37:04,499 INFO L226 Difference]: Without dead ends: 301 [2021-07-09 17:37:04,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 829.0ms TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:37:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-07-09 17:37:04,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2021-07-09 17:37:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.2533333333333334) internal successors, (676), 300 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 676 transitions. [2021-07-09 17:37:04,501 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 676 transitions. Word has length 20 [2021-07-09 17:37:04,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:04,501 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 676 transitions. [2021-07-09 17:37:04,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:04,501 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 676 transitions. [2021-07-09 17:37:04,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:04,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:04,502 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:04,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4902,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:04,702 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:04,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:04,702 INFO L82 PathProgramCache]: Analyzing trace with hash 95784765, now seen corresponding path program 596 times [2021-07-09 17:37:04,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:04,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856710992] [2021-07-09 17:37:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:04,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:04,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856710992] [2021-07-09 17:37:04,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856710992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:04,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288472769] [2021-07-09 17:37:04,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:04,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:04,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:04,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:04,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:05,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288472769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:05,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:05,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:05,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710996087] [2021-07-09 17:37:05,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:05,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:05,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:05,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:05,399 INFO L87 Difference]: Start difference. First operand 301 states and 676 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:06,074 INFO L93 Difference]: Finished difference Result 327 states and 717 transitions. [2021-07-09 17:37:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:37:06,074 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:06,075 INFO L225 Difference]: With dead ends: 327 [2021-07-09 17:37:06,075 INFO L226 Difference]: Without dead ends: 316 [2021-07-09 17:37:06,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1001.4ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:37:06,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-09 17:37:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 302. [2021-07-09 17:37:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.2524916943521593) internal successors, (678), 301 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 678 transitions. [2021-07-09 17:37:06,078 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 678 transitions. Word has length 20 [2021-07-09 17:37:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:06,078 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 678 transitions. [2021-07-09 17:37:06,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,078 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 678 transitions. [2021-07-09 17:37:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:06,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:06,078 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4914 [2021-07-09 17:37:06,279 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1430376095, now seen corresponding path program 597 times [2021-07-09 17:37:06,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498088240] [2021-07-09 17:37:06,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498088240] [2021-07-09 17:37:06,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498088240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:06,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758800716] [2021-07-09 17:37:06,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:06,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:37:06,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:06,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:06,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758800716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:06,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:06,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:06,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937173486] [2021-07-09 17:37:06,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:06,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:06,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:06,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:06,845 INFO L87 Difference]: Start difference. First operand 302 states and 678 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:07,970 INFO L93 Difference]: Finished difference Result 373 states and 802 transitions. [2021-07-09 17:37:07,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:37:07,970 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:07,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:07,970 INFO L225 Difference]: With dead ends: 373 [2021-07-09 17:37:07,970 INFO L226 Difference]: Without dead ends: 354 [2021-07-09 17:37:07,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1296.4ms TimeCoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:37:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-09 17:37:07,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 303. [2021-07-09 17:37:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.251655629139073) internal successors, (680), 302 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 680 transitions. [2021-07-09 17:37:07,973 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 680 transitions. Word has length 20 [2021-07-09 17:37:07,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:07,973 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 680 transitions. [2021-07-09 17:37:07,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,973 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 680 transitions. [2021-07-09 17:37:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:07,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:07,974 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:08,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4926,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:08,174 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:08,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:08,175 INFO L82 PathProgramCache]: Analyzing trace with hash 602131031, now seen corresponding path program 598 times [2021-07-09 17:37:08,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:08,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978609377] [2021-07-09 17:37:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:08,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:08,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978609377] [2021-07-09 17:37:08,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978609377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:08,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373168455] [2021-07-09 17:37:08,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:08,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:08,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:08,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:37:08,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:08,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373168455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:08,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:08,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:08,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109367205] [2021-07-09 17:37:08,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:08,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:08,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:08,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:08,833 INFO L87 Difference]: Start difference. First operand 303 states and 680 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:09,547 INFO L93 Difference]: Finished difference Result 356 states and 766 transitions. [2021-07-09 17:37:09,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:37:09,548 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:09,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:09,548 INFO L225 Difference]: With dead ends: 356 [2021-07-09 17:37:09,548 INFO L226 Difference]: Without dead ends: 338 [2021-07-09 17:37:09,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1004.2ms TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:37:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-09 17:37:09,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 305. [2021-07-09 17:37:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.25) internal successors, (684), 304 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 684 transitions. [2021-07-09 17:37:09,551 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 684 transitions. Word has length 20 [2021-07-09 17:37:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:09,551 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 684 transitions. [2021-07-09 17:37:09,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 684 transitions. [2021-07-09 17:37:09,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:09,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:09,552 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:09,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4938 [2021-07-09 17:37:09,752 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:09,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:09,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1936722361, now seen corresponding path program 599 times [2021-07-09 17:37:09,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:09,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581798286] [2021-07-09 17:37:09,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:09,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:09,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581798286] [2021-07-09 17:37:09,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581798286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:09,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021021615] [2021-07-09 17:37:09,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:10,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:37:10,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:10,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:10,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:10,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021021615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:10,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:10,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:10,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780272802] [2021-07-09 17:37:10,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:10,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:10,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:10,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:10,414 INFO L87 Difference]: Start difference. First operand 305 states and 684 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:11,211 INFO L93 Difference]: Finished difference Result 374 states and 801 transitions. [2021-07-09 17:37:11,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:37:11,211 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:11,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:11,212 INFO L225 Difference]: With dead ends: 374 [2021-07-09 17:37:11,212 INFO L226 Difference]: Without dead ends: 355 [2021-07-09 17:37:11,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1052.2ms TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:37:11,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-07-09 17:37:11,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 306. [2021-07-09 17:37:11,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.2491803278688525) internal successors, (686), 305 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 686 transitions. [2021-07-09 17:37:11,215 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 686 transitions. Word has length 20 [2021-07-09 17:37:11,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:11,215 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 686 transitions. [2021-07-09 17:37:11,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:11,215 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 686 transitions. [2021-07-09 17:37:11,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:11,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:11,215 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:11,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4950,600 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:11,416 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:11,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1398866783, now seen corresponding path program 600 times [2021-07-09 17:37:11,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:11,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770388396] [2021-07-09 17:37:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:11,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:11,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770388396] [2021-07-09 17:37:11,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770388396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:11,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964024655] [2021-07-09 17:37:11,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:11,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:37:11,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:11,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:37:11,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:11,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964024655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:11,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:11,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:11,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406863823] [2021-07-09 17:37:11,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:11,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:11,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:11,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:11,957 INFO L87 Difference]: Start difference. First operand 306 states and 686 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:12,637 INFO L93 Difference]: Finished difference Result 369 states and 798 transitions. [2021-07-09 17:37:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:37:12,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:12,637 INFO L225 Difference]: With dead ends: 369 [2021-07-09 17:37:12,637 INFO L226 Difference]: Without dead ends: 350 [2021-07-09 17:37:12,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 759.0ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:37:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-07-09 17:37:12,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 306. [2021-07-09 17:37:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.2491803278688525) internal successors, (686), 305 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 686 transitions. [2021-07-09 17:37:12,640 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 686 transitions. Word has length 20 [2021-07-09 17:37:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:12,640 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 686 transitions. [2021-07-09 17:37:12,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 686 transitions. [2021-07-09 17:37:12,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:12,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:12,641 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:12,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4963,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:12,841 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:12,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1354383623, now seen corresponding path program 601 times [2021-07-09 17:37:12,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:12,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599462521] [2021-07-09 17:37:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:13,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:13,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599462521] [2021-07-09 17:37:13,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599462521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:13,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056245110] [2021-07-09 17:37:13,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:13,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:37:13,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:13,395 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:37:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:13,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056245110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:13,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:13,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:13,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911744974] [2021-07-09 17:37:13,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:13,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:13,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:13,567 INFO L87 Difference]: Start difference. First operand 306 states and 686 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:13,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:13,952 INFO L93 Difference]: Finished difference Result 322 states and 710 transitions. [2021-07-09 17:37:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:37:13,952 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:13,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:13,953 INFO L225 Difference]: With dead ends: 322 [2021-07-09 17:37:13,953 INFO L226 Difference]: Without dead ends: 309 [2021-07-09 17:37:13,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 724.7ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:37:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-07-09 17:37:13,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2021-07-09 17:37:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.2467532467532467) internal successors, (692), 308 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 692 transitions. [2021-07-09 17:37:13,955 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 692 transitions. Word has length 20 [2021-07-09 17:37:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:13,955 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 692 transitions. [2021-07-09 17:37:13,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:13,955 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 692 transitions. [2021-07-09 17:37:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:13,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:13,956 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:14,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4975,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:14,156 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:14,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:14,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1363241943, now seen corresponding path program 602 times [2021-07-09 17:37:14,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:14,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815803427] [2021-07-09 17:37:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:14,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:14,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815803427] [2021-07-09 17:37:14,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815803427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:14,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170784984] [2021-07-09 17:37:14,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:14,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:14,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:14,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:14,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:14,736 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:37:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:14,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170784984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:14,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:14,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:14,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171439884] [2021-07-09 17:37:14,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:14,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:14,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:14,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:14,931 INFO L87 Difference]: Start difference. First operand 309 states and 692 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:15,746 INFO L93 Difference]: Finished difference Result 337 states and 737 transitions. [2021-07-09 17:37:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:37:15,746 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:15,747 INFO L225 Difference]: With dead ends: 337 [2021-07-09 17:37:15,747 INFO L226 Difference]: Without dead ends: 326 [2021-07-09 17:37:15,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1112.4ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:37:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-09 17:37:15,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 310. [2021-07-09 17:37:15,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.2459546925566345) internal successors, (694), 309 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 694 transitions. [2021-07-09 17:37:15,750 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 694 transitions. Word has length 20 [2021-07-09 17:37:15,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:15,750 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 694 transitions. [2021-07-09 17:37:15,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,750 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 694 transitions. [2021-07-09 17:37:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:15,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:15,750 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:15,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4987 [2021-07-09 17:37:15,950 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:15,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:15,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1597134023, now seen corresponding path program 603 times [2021-07-09 17:37:15,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:15,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545582383] [2021-07-09 17:37:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:16,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:16,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545582383] [2021-07-09 17:37:16,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545582383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:16,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489985078] [2021-07-09 17:37:16,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:16,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:37:16,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:16,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 17:37:16,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:16,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489985078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:16,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:16,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:16,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744748123] [2021-07-09 17:37:16,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:16,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:16,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:16,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:16,664 INFO L87 Difference]: Start difference. First operand 310 states and 694 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:17,392 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-07-09 17:37:17,575 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-07-09 17:37:17,817 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-07-09 17:37:18,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:18,122 INFO L93 Difference]: Finished difference Result 406 states and 855 transitions. [2021-07-09 17:37:18,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:37:18,122 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:18,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:18,123 INFO L225 Difference]: With dead ends: 406 [2021-07-09 17:37:18,123 INFO L226 Difference]: Without dead ends: 380 [2021-07-09 17:37:18,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1632.1ms TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:37:18,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-07-09 17:37:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 308. [2021-07-09 17:37:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.247557003257329) internal successors, (690), 307 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 690 transitions. [2021-07-09 17:37:18,129 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 690 transitions. Word has length 20 [2021-07-09 17:37:18,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:18,129 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 690 transitions. [2021-07-09 17:37:18,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:18,129 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 690 transitions. [2021-07-09 17:37:18,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:18,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:18,130 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:18,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4999,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:18,331 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:18,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1869588209, now seen corresponding path program 604 times [2021-07-09 17:37:18,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:18,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220085258] [2021-07-09 17:37:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:18,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:18,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220085258] [2021-07-09 17:37:18,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220085258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:18,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097254465] [2021-07-09 17:37:18,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:18,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:18,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:18,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:18,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:19,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097254465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:19,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:19,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:19,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112285458] [2021-07-09 17:37:19,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:19,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:19,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:19,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:19,129 INFO L87 Difference]: Start difference. First operand 308 states and 690 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:20,836 INFO L93 Difference]: Finished difference Result 393 states and 830 transitions. [2021-07-09 17:37:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:37:20,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:20,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:20,837 INFO L225 Difference]: With dead ends: 393 [2021-07-09 17:37:20,837 INFO L226 Difference]: Without dead ends: 372 [2021-07-09 17:37:20,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1969.6ms TimeCoverageRelationStatistics Valid=211, Invalid=1681, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:37:20,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-09 17:37:20,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 310. [2021-07-09 17:37:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.249190938511327) internal successors, (695), 309 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 695 transitions. [2021-07-09 17:37:20,840 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 695 transitions. Word has length 20 [2021-07-09 17:37:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:20,840 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 695 transitions. [2021-07-09 17:37:20,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 695 transitions. [2021-07-09 17:37:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:20,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:20,840 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:21,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5014 [2021-07-09 17:37:21,041 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:21,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:21,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1628643335, now seen corresponding path program 605 times [2021-07-09 17:37:21,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:21,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866423038] [2021-07-09 17:37:21,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:21,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:21,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866423038] [2021-07-09 17:37:21,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866423038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:21,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966163730] [2021-07-09 17:37:21,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:21,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:37:21,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:21,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:37:21,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:21,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966163730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:21,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:21,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:21,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712047297] [2021-07-09 17:37:21,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:21,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:21,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:21,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:21,591 INFO L87 Difference]: Start difference. First operand 310 states and 695 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:22,258 INFO L93 Difference]: Finished difference Result 373 states and 807 transitions. [2021-07-09 17:37:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:37:22,258 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:22,259 INFO L225 Difference]: With dead ends: 373 [2021-07-09 17:37:22,259 INFO L226 Difference]: Without dead ends: 354 [2021-07-09 17:37:22,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 787.4ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:37:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-09 17:37:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 310. [2021-07-09 17:37:22,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.249190938511327) internal successors, (695), 309 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:22,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 695 transitions. [2021-07-09 17:37:22,262 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 695 transitions. Word has length 20 [2021-07-09 17:37:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:22,262 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 695 transitions. [2021-07-09 17:37:22,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:22,262 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 695 transitions. [2021-07-09 17:37:22,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:22,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:22,262 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:22,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5028,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:22,463 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:22,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:22,463 INFO L82 PathProgramCache]: Analyzing trace with hash 386453271, now seen corresponding path program 606 times [2021-07-09 17:37:22,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:22,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580175281] [2021-07-09 17:37:22,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:22,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:22,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580175281] [2021-07-09 17:37:22,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580175281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:22,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151644241] [2021-07-09 17:37:22,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:22,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:37:22,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:22,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:22,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:23,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151644241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:23,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:23,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:23,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050165592] [2021-07-09 17:37:23,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:23,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:23,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:23,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:23,165 INFO L87 Difference]: Start difference. First operand 310 states and 695 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:23,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:23,925 INFO L93 Difference]: Finished difference Result 357 states and 778 transitions. [2021-07-09 17:37:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:37:23,925 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:23,926 INFO L225 Difference]: With dead ends: 357 [2021-07-09 17:37:23,926 INFO L226 Difference]: Without dead ends: 339 [2021-07-09 17:37:23,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1044.9ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:37:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-09 17:37:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 313. [2021-07-09 17:37:23,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.246794871794872) internal successors, (701), 312 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 701 transitions. [2021-07-09 17:37:23,929 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 701 transitions. Word has length 20 [2021-07-09 17:37:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:23,929 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 701 transitions. [2021-07-09 17:37:23,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 701 transitions. [2021-07-09 17:37:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:23,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:23,929 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:24,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5041 [2021-07-09 17:37:24,129 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:24,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:24,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1721044601, now seen corresponding path program 607 times [2021-07-09 17:37:24,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:24,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265959380] [2021-07-09 17:37:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:24,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:24,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265959380] [2021-07-09 17:37:24,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265959380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:24,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128852911] [2021-07-09 17:37:24,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:24,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:37:24,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:24,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128852911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:24,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:24,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:24,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244180897] [2021-07-09 17:37:24,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:24,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:24,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:24,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:24,828 INFO L87 Difference]: Start difference. First operand 313 states and 701 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:26,043 INFO L93 Difference]: Finished difference Result 383 states and 817 transitions. [2021-07-09 17:37:26,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:37:26,043 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:26,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:26,043 INFO L225 Difference]: With dead ends: 383 [2021-07-09 17:37:26,043 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 17:37:26,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1462.8ms TimeCoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:37:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 17:37:26,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 314. [2021-07-09 17:37:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-07-09 17:37:26,046 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-07-09 17:37:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:26,046 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-07-09 17:37:26,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-07-09 17:37:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:26,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:26,047 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:26,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5053 [2021-07-09 17:37:26,247 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:26,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1183189023, now seen corresponding path program 608 times [2021-07-09 17:37:26,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:26,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845465245] [2021-07-09 17:37:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:26,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:26,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845465245] [2021-07-09 17:37:26,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845465245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:26,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113362511] [2021-07-09 17:37:26,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:26,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:26,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:26,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:26,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:26,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113362511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:26,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:26,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:26,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630495424] [2021-07-09 17:37:26,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:26,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:26,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:26,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:26,820 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:27,791 INFO L93 Difference]: Finished difference Result 398 states and 841 transitions. [2021-07-09 17:37:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:37:27,791 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:27,792 INFO L225 Difference]: With dead ends: 398 [2021-07-09 17:37:27,792 INFO L226 Difference]: Without dead ends: 376 [2021-07-09 17:37:27,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1160.2ms TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:37:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-09 17:37:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 314. [2021-07-09 17:37:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-07-09 17:37:27,795 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-07-09 17:37:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:27,795 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-07-09 17:37:27,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-07-09 17:37:27,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:27,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:27,795 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:27,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5063 [2021-07-09 17:37:27,996 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:27,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1689535289, now seen corresponding path program 609 times [2021-07-09 17:37:27,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:27,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382414661] [2021-07-09 17:37:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:28,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:28,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382414661] [2021-07-09 17:37:28,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382414661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:28,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671743561] [2021-07-09 17:37:28,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:28,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:37:28,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:28,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 17:37:28,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:28,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671743561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:28,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:28,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:28,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829306231] [2021-07-09 17:37:28,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:28,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:28,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:28,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:28,607 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:29,231 INFO L93 Difference]: Finished difference Result 382 states and 826 transitions. [2021-07-09 17:37:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:37:29,231 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:29,231 INFO L225 Difference]: With dead ends: 382 [2021-07-09 17:37:29,232 INFO L226 Difference]: Without dead ends: 363 [2021-07-09 17:37:29,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 824.8ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:37:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-07-09 17:37:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 314. [2021-07-09 17:37:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-07-09 17:37:29,234 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-07-09 17:37:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:29,234 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-07-09 17:37:29,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-07-09 17:37:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:29,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:29,235 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:29,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5075,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:29,435 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:29,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1230116495, now seen corresponding path program 610 times [2021-07-09 17:37:29,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:29,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381324148] [2021-07-09 17:37:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:29,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:29,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381324148] [2021-07-09 17:37:29,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381324148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:29,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570029674] [2021-07-09 17:37:29,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:29,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:29,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:29,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:37:29,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:30,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570029674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:30,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:30,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:30,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803472160] [2021-07-09 17:37:30,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:30,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:30,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:30,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:30,159 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:30,525 INFO L93 Difference]: Finished difference Result 330 states and 727 transitions. [2021-07-09 17:37:30,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:30,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:30,526 INFO L225 Difference]: With dead ends: 330 [2021-07-09 17:37:30,526 INFO L226 Difference]: Without dead ends: 315 [2021-07-09 17:37:30,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 793.5ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:37:30,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-09 17:37:30,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-07-09 17:37:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.248407643312102) internal successors, (706), 314 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 706 transitions. [2021-07-09 17:37:30,529 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 706 transitions. Word has length 20 [2021-07-09 17:37:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:30,529 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 706 transitions. [2021-07-09 17:37:30,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 706 transitions. [2021-07-09 17:37:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:30,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:30,529 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:30,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5088 [2021-07-09 17:37:30,729 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:30,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:30,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1411897427, now seen corresponding path program 611 times [2021-07-09 17:37:30,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:30,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060938614] [2021-07-09 17:37:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:30,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:30,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060938614] [2021-07-09 17:37:30,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060938614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:30,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291628285] [2021-07-09 17:37:30,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:30,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:37:30,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:30,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:37:30,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:31,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291628285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:31,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:31,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:31,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157338958] [2021-07-09 17:37:31,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:31,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:31,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:31,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:31,445 INFO L87 Difference]: Start difference. First operand 315 states and 706 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:31,810 INFO L93 Difference]: Finished difference Result 329 states and 726 transitions. [2021-07-09 17:37:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:31,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:31,810 INFO L225 Difference]: With dead ends: 329 [2021-07-09 17:37:31,810 INFO L226 Difference]: Without dead ends: 316 [2021-07-09 17:37:31,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 757.2ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:37:31,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-09 17:37:31,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-07-09 17:37:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.2476190476190476) internal successors, (708), 315 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 708 transitions. [2021-07-09 17:37:31,813 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 708 transitions. Word has length 20 [2021-07-09 17:37:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:31,813 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 708 transitions. [2021-07-09 17:37:31,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,813 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 708 transitions. [2021-07-09 17:37:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:31,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:31,814 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:32,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5100 [2021-07-09 17:37:32,014 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:32,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:32,014 INFO L82 PathProgramCache]: Analyzing trace with hash -165444303, now seen corresponding path program 612 times [2021-07-09 17:37:32,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:32,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268055029] [2021-07-09 17:37:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:32,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:32,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268055029] [2021-07-09 17:37:32,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268055029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:32,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847998332] [2021-07-09 17:37:32,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:32,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:37:32,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:32,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:32,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:32,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847998332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:32,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:32,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:32,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405670943] [2021-07-09 17:37:32,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:32,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:32,803 INFO L87 Difference]: Start difference. First operand 316 states and 708 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:33,495 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-07-09 17:37:33,712 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-07-09 17:37:33,865 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2021-07-09 17:37:34,115 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2021-07-09 17:37:34,385 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-07-09 17:37:34,530 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-07-09 17:37:34,656 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-07-09 17:37:34,856 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-07-09 17:37:35,065 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-07-09 17:37:35,255 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-07-09 17:37:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:35,298 INFO L93 Difference]: Finished difference Result 404 states and 851 transitions. [2021-07-09 17:37:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:37:35,299 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:35,299 INFO L225 Difference]: With dead ends: 404 [2021-07-09 17:37:35,299 INFO L226 Difference]: Without dead ends: 379 [2021-07-09 17:37:35,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 2789.0ms TimeCoverageRelationStatistics Valid=298, Invalid=1864, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:37:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-09 17:37:35,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 314. [2021-07-09 17:37:35,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-07-09 17:37:35,302 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-07-09 17:37:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:35,302 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-07-09 17:37:35,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:35,302 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-07-09 17:37:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:35,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:35,303 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:35,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5112 [2021-07-09 17:37:35,503 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:35,503 INFO L82 PathProgramCache]: Analyzing trace with hash -71237511, now seen corresponding path program 613 times [2021-07-09 17:37:35,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:35,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164602811] [2021-07-09 17:37:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:35,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:35,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164602811] [2021-07-09 17:37:35,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164602811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:35,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255758022] [2021-07-09 17:37:35,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:35,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:35,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:36,070 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-07-09 17:37:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:36,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255758022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:36,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:36,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:36,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404582620] [2021-07-09 17:37:36,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:36,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:36,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:36,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:36,237 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:36,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:36,660 INFO L93 Difference]: Finished difference Result 330 states and 728 transitions. [2021-07-09 17:37:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:37:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:36,661 INFO L225 Difference]: With dead ends: 330 [2021-07-09 17:37:36,661 INFO L226 Difference]: Without dead ends: 317 [2021-07-09 17:37:36,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 835.7ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:37:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-09 17:37:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 316. [2021-07-09 17:37:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.2476190476190476) internal successors, (708), 315 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 708 transitions. [2021-07-09 17:37:36,663 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 708 transitions. Word has length 20 [2021-07-09 17:37:36,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:36,663 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 708 transitions. [2021-07-09 17:37:36,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 708 transitions. [2021-07-09 17:37:36,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:36,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:36,664 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:36,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5124,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:36,864 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:36,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:36,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1648579241, now seen corresponding path program 614 times [2021-07-09 17:37:36,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:36,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552726579] [2021-07-09 17:37:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:37,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:37,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552726579] [2021-07-09 17:37:37,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552726579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:37,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339880] [2021-07-09 17:37:37,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:37,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:37,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:37,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:37,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:37,408 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:37:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:37,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:37,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:37,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:37,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641486143] [2021-07-09 17:37:37,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:37,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:37,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:37,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:37,588 INFO L87 Difference]: Start difference. First operand 316 states and 708 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:38,777 INFO L93 Difference]: Finished difference Result 381 states and 826 transitions. [2021-07-09 17:37:38,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:37:38,777 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:38,777 INFO L225 Difference]: With dead ends: 381 [2021-07-09 17:37:38,777 INFO L226 Difference]: Without dead ends: 357 [2021-07-09 17:37:38,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1467.6ms TimeCoverageRelationStatistics Valid=203, Invalid=1279, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:37:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-09 17:37:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 318. [2021-07-09 17:37:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2523659305993693) internal successors, (714), 317 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 714 transitions. [2021-07-09 17:37:38,780 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 714 transitions. Word has length 20 [2021-07-09 17:37:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:38,781 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 714 transitions. [2021-07-09 17:37:38,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 714 transitions. [2021-07-09 17:37:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:38,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:38,781 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:38,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5135 [2021-07-09 17:37:38,981 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:38,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:38,982 INFO L82 PathProgramCache]: Analyzing trace with hash -313987911, now seen corresponding path program 615 times [2021-07-09 17:37:38,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:38,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083604153] [2021-07-09 17:37:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:39,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:39,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083604153] [2021-07-09 17:37:39,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083604153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848257931] [2021-07-09 17:37:39,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:39,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:37:39,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:39,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:37:39,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:39,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848257931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:39,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:39,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369041177] [2021-07-09 17:37:39,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:39,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:39,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:39,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:39,638 INFO L87 Difference]: Start difference. First operand 318 states and 714 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:41,019 INFO L93 Difference]: Finished difference Result 384 states and 823 transitions. [2021-07-09 17:37:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:37:41,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:41,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:41,019 INFO L225 Difference]: With dead ends: 384 [2021-07-09 17:37:41,019 INFO L226 Difference]: Without dead ends: 352 [2021-07-09 17:37:41,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1579.6ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:37:41,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-07-09 17:37:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 322. [2021-07-09 17:37:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.2585669781931466) internal successors, (725), 321 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 725 transitions. [2021-07-09 17:37:41,022 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 725 transitions. Word has length 20 [2021-07-09 17:37:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:41,023 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 725 transitions. [2021-07-09 17:37:41,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 725 transitions. [2021-07-09 17:37:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:41,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:41,023 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:41,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5147,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:41,223 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:41,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1142232975, now seen corresponding path program 616 times [2021-07-09 17:37:41,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:41,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670526152] [2021-07-09 17:37:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:41,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:41,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670526152] [2021-07-09 17:37:41,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670526152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:41,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244438428] [2021-07-09 17:37:41,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:41,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:41,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:37:41,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:41,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244438428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:41,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:41,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:41,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518367690] [2021-07-09 17:37:41,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:41,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:41,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:41,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:41,881 INFO L87 Difference]: Start difference. First operand 322 states and 725 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:42,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:42,739 INFO L93 Difference]: Finished difference Result 376 states and 818 transitions. [2021-07-09 17:37:42,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:37:42,739 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:42,740 INFO L225 Difference]: With dead ends: 376 [2021-07-09 17:37:42,740 INFO L226 Difference]: Without dead ends: 351 [2021-07-09 17:37:42,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1095.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:37:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-07-09 17:37:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-07-09 17:37:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.2577639751552794) internal successors, (727), 322 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 727 transitions. [2021-07-09 17:37:42,742 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 727 transitions. Word has length 20 [2021-07-09 17:37:42,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:42,743 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 727 transitions. [2021-07-09 17:37:42,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 727 transitions. [2021-07-09 17:37:42,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:42,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:42,743 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:42,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5159,617 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:42,943 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:42,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:42,944 INFO L82 PathProgramCache]: Analyzing trace with hash -345497223, now seen corresponding path program 617 times [2021-07-09 17:37:42,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:42,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80406228] [2021-07-09 17:37:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:43,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:43,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80406228] [2021-07-09 17:37:43,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80406228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711949557] [2021-07-09 17:37:43,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:43,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:37:43,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:43,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:37:43,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:43,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711949557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:43,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:43,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707338470] [2021-07-09 17:37:43,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:43,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:43,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:43,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:43,521 INFO L87 Difference]: Start difference. First operand 323 states and 727 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:44,347 INFO L93 Difference]: Finished difference Result 393 states and 843 transitions. [2021-07-09 17:37:44,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:37:44,347 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:44,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:44,348 INFO L225 Difference]: With dead ends: 393 [2021-07-09 17:37:44,348 INFO L226 Difference]: Without dead ends: 371 [2021-07-09 17:37:44,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 962.4ms TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:37:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-07-09 17:37:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 322. [2021-07-09 17:37:44,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.2585669781931466) internal successors, (725), 321 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 725 transitions. [2021-07-09 17:37:44,351 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 725 transitions. Word has length 20 [2021-07-09 17:37:44,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:44,351 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 725 transitions. [2021-07-09 17:37:44,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 725 transitions. [2021-07-09 17:37:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:44,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:44,351 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:44,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5171,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:44,552 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:44,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1196219667, now seen corresponding path program 618 times [2021-07-09 17:37:44,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:44,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799088400] [2021-07-09 17:37:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:44,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:44,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799088400] [2021-07-09 17:37:44,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799088400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:44,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967059222] [2021-07-09 17:37:44,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:44,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:44,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:44,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:44,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:45,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967059222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:45,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:45,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720159917] [2021-07-09 17:37:45,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:45,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:45,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:45,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:45,228 INFO L87 Difference]: Start difference. First operand 322 states and 725 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:45,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:45,544 INFO L93 Difference]: Finished difference Result 338 states and 749 transitions. [2021-07-09 17:37:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:37:45,545 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:45,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:45,545 INFO L225 Difference]: With dead ends: 338 [2021-07-09 17:37:45,545 INFO L226 Difference]: Without dead ends: 325 [2021-07-09 17:37:45,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 699.3ms TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:37:45,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-07-09 17:37:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-07-09 17:37:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.256172839506173) internal successors, (731), 324 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 731 transitions. [2021-07-09 17:37:45,548 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 731 transitions. Word has length 20 [2021-07-09 17:37:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:45,548 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 731 transitions. [2021-07-09 17:37:45,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 731 transitions. [2021-07-09 17:37:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:45,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:45,548 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:45,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5183 [2021-07-09 17:37:45,749 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:45,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:45,749 INFO L82 PathProgramCache]: Analyzing trace with hash -381122063, now seen corresponding path program 619 times [2021-07-09 17:37:45,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:45,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173227106] [2021-07-09 17:37:45,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:45,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:45,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173227106] [2021-07-09 17:37:45,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173227106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19522814] [2021-07-09 17:37:45,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:45,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:37:45,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:46,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19522814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:46,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:46,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:46,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943235905] [2021-07-09 17:37:46,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:46,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:46,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:46,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:46,432 INFO L87 Difference]: Start difference. First operand 325 states and 731 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:47,739 INFO L93 Difference]: Finished difference Result 415 states and 880 transitions. [2021-07-09 17:37:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:37:47,739 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:47,740 INFO L225 Difference]: With dead ends: 415 [2021-07-09 17:37:47,740 INFO L226 Difference]: Without dead ends: 390 [2021-07-09 17:37:47,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1578.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:37:47,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-09 17:37:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 325. [2021-07-09 17:37:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.256172839506173) internal successors, (731), 324 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 731 transitions. [2021-07-09 17:37:47,743 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 731 transitions. Word has length 20 [2021-07-09 17:37:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:47,743 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 731 transitions. [2021-07-09 17:37:47,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 731 transitions. [2021-07-09 17:37:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:47,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:47,743 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:47,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5195,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:47,944 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:47,944 INFO L82 PathProgramCache]: Analyzing trace with hash 125224203, now seen corresponding path program 620 times [2021-07-09 17:37:47,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:47,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467438894] [2021-07-09 17:37:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:48,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:48,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467438894] [2021-07-09 17:37:48,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467438894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:48,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435260453] [2021-07-09 17:37:48,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:48,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:48,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:48,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:48,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:48,538 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:37:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:48,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435260453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:48,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:48,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:48,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115490935] [2021-07-09 17:37:48,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:48,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:48,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:48,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:48,659 INFO L87 Difference]: Start difference. First operand 325 states and 731 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:49,461 INFO L93 Difference]: Finished difference Result 378 states and 811 transitions. [2021-07-09 17:37:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:37:49,462 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:49,462 INFO L225 Difference]: With dead ends: 378 [2021-07-09 17:37:49,462 INFO L226 Difference]: Without dead ends: 346 [2021-07-09 17:37:49,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1132.8ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:37:49,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-09 17:37:49,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 326. [2021-07-09 17:37:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.2553846153846155) internal successors, (733), 325 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 733 transitions. [2021-07-09 17:37:49,465 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 733 transitions. Word has length 20 [2021-07-09 17:37:49,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:49,465 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 733 transitions. [2021-07-09 17:37:49,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 733 transitions. [2021-07-09 17:37:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:49,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:49,465 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:49,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5207,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:49,666 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:49,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:49,666 INFO L82 PathProgramCache]: Analyzing trace with hash 921959955, now seen corresponding path program 621 times [2021-07-09 17:37:49,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:49,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174317489] [2021-07-09 17:37:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:49,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:49,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174317489] [2021-07-09 17:37:49,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174317489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:49,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697923591] [2021-07-09 17:37:49,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:49,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:37:49,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:49,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 17:37:49,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:50,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697923591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:50,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:50,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:50,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357609988] [2021-07-09 17:37:50,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:50,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:50,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:50,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:50,203 INFO L87 Difference]: Start difference. First operand 326 states and 733 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:51,164 INFO L93 Difference]: Finished difference Result 414 states and 889 transitions. [2021-07-09 17:37:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:37:51,164 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:51,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:51,165 INFO L225 Difference]: With dead ends: 414 [2021-07-09 17:37:51,165 INFO L226 Difference]: Without dead ends: 400 [2021-07-09 17:37:51,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1067.9ms TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:37:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-09 17:37:51,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 328. [2021-07-09 17:37:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2629969418960245) internal successors, (740), 327 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 740 transitions. [2021-07-09 17:37:51,168 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 740 transitions. Word has length 20 [2021-07-09 17:37:51,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:51,168 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 740 transitions. [2021-07-09 17:37:51,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:51,168 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 740 transitions. [2021-07-09 17:37:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:51,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:51,168 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:51,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5219,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:51,369 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:51,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:51,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1357910735, now seen corresponding path program 622 times [2021-07-09 17:37:51,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:51,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160606236] [2021-07-09 17:37:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:51,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:51,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160606236] [2021-07-09 17:37:51,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160606236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090736943] [2021-07-09 17:37:51,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:51,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:51,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:51,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:37:51,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:51,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090736943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:51,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:51,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914764356] [2021-07-09 17:37:51,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:51,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:51,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:51,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:51,957 INFO L87 Difference]: Start difference. First operand 328 states and 740 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:53,044 INFO L93 Difference]: Finished difference Result 380 states and 831 transitions. [2021-07-09 17:37:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:37:53,044 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:53,044 INFO L225 Difference]: With dead ends: 380 [2021-07-09 17:37:53,045 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 17:37:53,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1239.8ms TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:37:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 17:37:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 330. [2021-07-09 17:37:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-07-09 17:37:53,048 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-07-09 17:37:53,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:53,048 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-07-09 17:37:53,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-07-09 17:37:53,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:53,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:53,048 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:53,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5231 [2021-07-09 17:37:53,249 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:53,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:53,249 INFO L82 PathProgramCache]: Analyzing trace with hash -561174983, now seen corresponding path program 623 times [2021-07-09 17:37:53,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:53,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232654207] [2021-07-09 17:37:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:53,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:53,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232654207] [2021-07-09 17:37:53,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232654207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:53,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831140185] [2021-07-09 17:37:53,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:53,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:37:53,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:53,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:53,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:53,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831140185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:53,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:53,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:53,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651310804] [2021-07-09 17:37:53,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:53,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:53,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:53,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:53,929 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:55,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:55,137 INFO L93 Difference]: Finished difference Result 412 states and 877 transitions. [2021-07-09 17:37:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:37:55,137 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:55,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:55,138 INFO L225 Difference]: With dead ends: 412 [2021-07-09 17:37:55,138 INFO L226 Difference]: Without dead ends: 390 [2021-07-09 17:37:55,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1468.3ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:37:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-09 17:37:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 330. [2021-07-09 17:37:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-07-09 17:37:55,141 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-07-09 17:37:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:55,141 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-07-09 17:37:55,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-07-09 17:37:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:55,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:55,141 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:55,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5246,624 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:55,342 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:55,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:55,342 INFO L82 PathProgramCache]: Analyzing trace with hash -54828717, now seen corresponding path program 624 times [2021-07-09 17:37:55,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:55,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656310095] [2021-07-09 17:37:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:55,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:55,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656310095] [2021-07-09 17:37:55,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656310095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:55,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665338142] [2021-07-09 17:37:55,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:55,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:37:55,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:55,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:37:55,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:55,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665338142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:55,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:55,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:55,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636557432] [2021-07-09 17:37:55,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:55,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:55,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:55,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:55,925 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:56,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:56,504 INFO L93 Difference]: Finished difference Result 397 states and 864 transitions. [2021-07-09 17:37:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:37:56,504 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:56,505 INFO L225 Difference]: With dead ends: 397 [2021-07-09 17:37:56,505 INFO L226 Difference]: Without dead ends: 378 [2021-07-09 17:37:56,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 749.7ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:37:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-09 17:37:56,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 330. [2021-07-09 17:37:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-07-09 17:37:56,508 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-07-09 17:37:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:56,508 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-07-09 17:37:56,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:56,508 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-07-09 17:37:56,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:56,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:56,508 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:56,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5259,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:56,708 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:56,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1832686521, now seen corresponding path program 625 times [2021-07-09 17:37:56,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:56,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045277254] [2021-07-09 17:37:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:56,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:56,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045277254] [2021-07-09 17:37:56,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045277254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:56,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403616744] [2021-07-09 17:37:56,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:56,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:56,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:57,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403616744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:57,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:57,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:57,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873887884] [2021-07-09 17:37:57,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:57,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:57,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:57,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:57,518 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:58,022 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-07-09 17:37:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:58,200 INFO L93 Difference]: Finished difference Result 355 states and 781 transitions. [2021-07-09 17:37:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:37:58,201 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:58,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:58,201 INFO L225 Difference]: With dead ends: 355 [2021-07-09 17:37:58,201 INFO L226 Difference]: Without dead ends: 348 [2021-07-09 17:37:58,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1140.2ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:37:58,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-09 17:37:58,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 331. [2021-07-09 17:37:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.2636363636363637) internal successors, (747), 330 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 747 transitions. [2021-07-09 17:37:58,204 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 747 transitions. Word has length 20 [2021-07-09 17:37:58,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:58,204 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 747 transitions. [2021-07-09 17:37:58,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:58,204 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 747 transitions. [2021-07-09 17:37:58,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:58,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:58,204 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:58,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5271 [2021-07-09 17:37:58,405 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:58,405 INFO L82 PathProgramCache]: Analyzing trace with hash 255344791, now seen corresponding path program 626 times [2021-07-09 17:37:58,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:58,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216542566] [2021-07-09 17:37:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:58,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:58,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216542566] [2021-07-09 17:37:58,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216542566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:58,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992419991] [2021-07-09 17:37:58,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:58,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:58,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:58,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:37:58,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:59,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992419991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:59,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:59,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:37:59,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239702009] [2021-07-09 17:37:59,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:37:59,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:59,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:37:59,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:37:59,135 INFO L87 Difference]: Start difference. First operand 331 states and 747 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:00,130 INFO L93 Difference]: Finished difference Result 382 states and 824 transitions. [2021-07-09 17:38:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:38:00,130 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:00,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:00,130 INFO L225 Difference]: With dead ends: 382 [2021-07-09 17:38:00,130 INFO L226 Difference]: Without dead ends: 351 [2021-07-09 17:38:00,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1285.1ms TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:38:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-07-09 17:38:00,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 330. [2021-07-09 17:38:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-07-09 17:38:00,133 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-07-09 17:38:00,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:00,133 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-07-09 17:38:00,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,133 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-07-09 17:38:00,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:00,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:00,134 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:00,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5285,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:00,334 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:00,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:00,334 INFO L82 PathProgramCache]: Analyzing trace with hash 761691057, now seen corresponding path program 627 times [2021-07-09 17:38:00,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:00,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313513320] [2021-07-09 17:38:00,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:00,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:00,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313513320] [2021-07-09 17:38:00,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313513320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:00,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624643137] [2021-07-09 17:38:00,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:00,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:38:00,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:00,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:38:00,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:00,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624643137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:00,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:00,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:00,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507083147] [2021-07-09 17:38:00,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:00,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:00,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:00,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:00,977 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:02,168 INFO L93 Difference]: Finished difference Result 392 states and 842 transitions. [2021-07-09 17:38:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:38:02,169 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:02,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:02,169 INFO L225 Difference]: With dead ends: 392 [2021-07-09 17:38:02,169 INFO L226 Difference]: Without dead ends: 371 [2021-07-09 17:38:02,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1403.8ms TimeCoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:38:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-07-09 17:38:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 330. [2021-07-09 17:38:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-07-09 17:38:02,172 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-07-09 17:38:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:02,172 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-07-09 17:38:02,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-07-09 17:38:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:02,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:02,173 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:02,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5297 [2021-07-09 17:38:02,373 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:02,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:02,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1366393994, now seen corresponding path program 628 times [2021-07-09 17:38:02,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:02,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922656264] [2021-07-09 17:38:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:38:02,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:02,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922656264] [2021-07-09 17:38:02,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922656264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:02,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873631398] [2021-07-09 17:38:02,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:02,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:02,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:02,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:38:02,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:38:02,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873631398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:02,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:02,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 17:38:02,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830920405] [2021-07-09 17:38:02,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:38:02,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:38:02,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:02,789 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:03,205 INFO L93 Difference]: Finished difference Result 383 states and 848 transitions. [2021-07-09 17:38:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:03,205 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:03,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:03,205 INFO L225 Difference]: With dead ends: 383 [2021-07-09 17:38:03,205 INFO L226 Difference]: Without dead ends: 381 [2021-07-09 17:38:03,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 562.6ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-09 17:38:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 330. [2021-07-09 17:38:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2583586626139818) internal successors, (743), 329 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 743 transitions. [2021-07-09 17:38:03,208 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 743 transitions. Word has length 20 [2021-07-09 17:38:03,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:03,208 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 743 transitions. [2021-07-09 17:38:03,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:03,208 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 743 transitions. [2021-07-09 17:38:03,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:03,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:03,209 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:03,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5312,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:03,409 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:03,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1558426809, now seen corresponding path program 629 times [2021-07-09 17:38:03,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:03,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136321332] [2021-07-09 17:38:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:03,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:03,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136321332] [2021-07-09 17:38:03,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136321332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:03,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545207424] [2021-07-09 17:38:03,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:03,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:38:03,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:03,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:03,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:04,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545207424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:04,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:04,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:04,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267823630] [2021-07-09 17:38:04,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:04,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:04,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:04,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:04,015 INFO L87 Difference]: Start difference. First operand 330 states and 743 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:04,992 INFO L93 Difference]: Finished difference Result 412 states and 885 transitions. [2021-07-09 17:38:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:38:04,992 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:04,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:04,993 INFO L225 Difference]: With dead ends: 412 [2021-07-09 17:38:04,993 INFO L226 Difference]: Without dead ends: 393 [2021-07-09 17:38:04,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1192.8ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:38:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-09 17:38:04,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 335. [2021-07-09 17:38:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.2574850299401197) internal successors, (754), 334 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:04,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 754 transitions. [2021-07-09 17:38:04,996 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 754 transitions. Word has length 20 [2021-07-09 17:38:04,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:04,996 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 754 transitions. [2021-07-09 17:38:04,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:04,996 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 754 transitions. [2021-07-09 17:38:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:04,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:04,996 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:05,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 630 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5321 [2021-07-09 17:38:05,197 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:05,197 INFO L82 PathProgramCache]: Analyzing trace with hash -721443881, now seen corresponding path program 630 times [2021-07-09 17:38:05,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:05,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042850309] [2021-07-09 17:38:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:05,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:05,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042850309] [2021-07-09 17:38:05,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042850309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:05,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406229408] [2021-07-09 17:38:05,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:05,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:05,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:05,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:05,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:05,760 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:38:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:05,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406229408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:05,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:05,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:05,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504908366] [2021-07-09 17:38:05,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:05,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:05,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:05,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:05,878 INFO L87 Difference]: Start difference. First operand 335 states and 754 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:06,580 INFO L93 Difference]: Finished difference Result 382 states and 828 transitions. [2021-07-09 17:38:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:06,580 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:06,580 INFO L225 Difference]: With dead ends: 382 [2021-07-09 17:38:06,581 INFO L226 Difference]: Without dead ends: 357 [2021-07-09 17:38:06,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1023.1ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:38:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-09 17:38:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 337. [2021-07-09 17:38:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.255952380952381) internal successors, (758), 336 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-07-09 17:38:06,583 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-07-09 17:38:06,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:06,584 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-07-09 17:38:06,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:06,584 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-07-09 17:38:06,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:06,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:06,584 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:06,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5333 [2021-07-09 17:38:06,784 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:06,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:06,785 INFO L82 PathProgramCache]: Analyzing trace with hash 75291871, now seen corresponding path program 631 times [2021-07-09 17:38:06,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:06,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609006653] [2021-07-09 17:38:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:06,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:06,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609006653] [2021-07-09 17:38:06,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609006653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:06,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268460952] [2021-07-09 17:38:06,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:06,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:06,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:07,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268460952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:07,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:07,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:07,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012139095] [2021-07-09 17:38:07,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:07,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:07,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:07,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:07,354 INFO L87 Difference]: Start difference. First operand 337 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:07,960 INFO L93 Difference]: Finished difference Result 397 states and 864 transitions. [2021-07-09 17:38:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:07,960 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:07,960 INFO L225 Difference]: With dead ends: 397 [2021-07-09 17:38:07,960 INFO L226 Difference]: Without dead ends: 378 [2021-07-09 17:38:07,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 854.1ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:38:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-09 17:38:07,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 337. [2021-07-09 17:38:07,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.255952380952381) internal successors, (758), 336 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-07-09 17:38:07,963 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-07-09 17:38:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:07,963 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-07-09 17:38:07,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-07-09 17:38:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:07,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:07,964 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:08,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5345,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:08,164 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:08,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:08,164 INFO L82 PathProgramCache]: Analyzing trace with hash 581638137, now seen corresponding path program 632 times [2021-07-09 17:38:08,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:08,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312704789] [2021-07-09 17:38:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:08,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312704789] [2021-07-09 17:38:08,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312704789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555087287] [2021-07-09 17:38:08,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:08,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:08,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:08,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555087287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:08,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:08,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:08,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468382240] [2021-07-09 17:38:08,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:08,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:08,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:08,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:08,808 INFO L87 Difference]: Start difference. First operand 337 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:09,483 INFO L93 Difference]: Finished difference Result 404 states and 878 transitions. [2021-07-09 17:38:09,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:38:09,484 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:09,484 INFO L225 Difference]: With dead ends: 404 [2021-07-09 17:38:09,484 INFO L226 Difference]: Without dead ends: 385 [2021-07-09 17:38:09,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 906.8ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:38:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-07-09 17:38:09,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 337. [2021-07-09 17:38:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.255952380952381) internal successors, (758), 336 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-07-09 17:38:09,487 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-07-09 17:38:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:09,487 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-07-09 17:38:09,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-07-09 17:38:09,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:09,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:09,488 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:09,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5357,633 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:09,688 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:09,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:09,689 INFO L82 PathProgramCache]: Analyzing trace with hash 546013297, now seen corresponding path program 633 times [2021-07-09 17:38:09,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:09,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186403192] [2021-07-09 17:38:09,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:09,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:09,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186403192] [2021-07-09 17:38:09,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186403192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:09,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963964084] [2021-07-09 17:38:09,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:09,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:38:09,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:09,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 17:38:09,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:10,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963964084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:10,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:10,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:10,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143784897] [2021-07-09 17:38:10,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:10,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:10,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:10,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:10,276 INFO L87 Difference]: Start difference. First operand 337 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:11,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:11,058 INFO L93 Difference]: Finished difference Result 391 states and 851 transitions. [2021-07-09 17:38:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:38:11,058 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:11,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:11,058 INFO L225 Difference]: With dead ends: 391 [2021-07-09 17:38:11,058 INFO L226 Difference]: Without dead ends: 366 [2021-07-09 17:38:11,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 992.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:38:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-09 17:38:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 340. [2021-07-09 17:38:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.253687315634218) internal successors, (764), 339 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 764 transitions. [2021-07-09 17:38:11,061 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 764 transitions. Word has length 20 [2021-07-09 17:38:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:11,061 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 764 transitions. [2021-07-09 17:38:11,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 764 transitions. [2021-07-09 17:38:11,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:11,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:11,062 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:11,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5369,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:11,270 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:11,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:11,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1342749049, now seen corresponding path program 634 times [2021-07-09 17:38:11,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:11,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037598440] [2021-07-09 17:38:11,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:11,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:11,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037598440] [2021-07-09 17:38:11,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037598440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:11,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670920925] [2021-07-09 17:38:11,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:11,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:11,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:11,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:11,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670920925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:11,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:11,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:11,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114739005] [2021-07-09 17:38:11,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:11,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:11,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:11,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:11,848 INFO L87 Difference]: Start difference. First operand 340 states and 764 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:12,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:12,459 INFO L93 Difference]: Finished difference Result 400 states and 870 transitions. [2021-07-09 17:38:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:38:12,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:12,460 INFO L225 Difference]: With dead ends: 400 [2021-07-09 17:38:12,460 INFO L226 Difference]: Without dead ends: 381 [2021-07-09 17:38:12,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 793.7ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:38:12,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-09 17:38:12,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 339. [2021-07-09 17:38:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.2544378698224854) internal successors, (762), 338 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:12,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 762 transitions. [2021-07-09 17:38:12,463 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 762 transitions. Word has length 20 [2021-07-09 17:38:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:12,463 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 762 transitions. [2021-07-09 17:38:12,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:12,464 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 762 transitions. [2021-07-09 17:38:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:12,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:12,464 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:12,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5383,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:12,664 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:12,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1849095315, now seen corresponding path program 635 times [2021-07-09 17:38:12,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:12,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655260979] [2021-07-09 17:38:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:12,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:12,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655260979] [2021-07-09 17:38:12,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655260979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:12,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145739384] [2021-07-09 17:38:12,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:12,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:12,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:12,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:12,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:13,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145739384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:13,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:13,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:13,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437431512] [2021-07-09 17:38:13,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:13,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:13,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:13,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:13,283 INFO L87 Difference]: Start difference. First operand 339 states and 762 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:13,941 INFO L93 Difference]: Finished difference Result 404 states and 878 transitions. [2021-07-09 17:38:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:13,941 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:13,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:13,942 INFO L225 Difference]: With dead ends: 404 [2021-07-09 17:38:13,942 INFO L226 Difference]: Without dead ends: 385 [2021-07-09 17:38:13,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 862.5ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:38:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-07-09 17:38:13,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 338. [2021-07-09 17:38:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.255192878338279) internal successors, (760), 337 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 760 transitions. [2021-07-09 17:38:13,945 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 760 transitions. Word has length 20 [2021-07-09 17:38:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:13,945 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 760 transitions. [2021-07-09 17:38:13,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 760 transitions. [2021-07-09 17:38:13,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:13,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:13,946 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:14,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5395 [2021-07-09 17:38:14,146 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:14,146 INFO L82 PathProgramCache]: Analyzing trace with hash 365960377, now seen corresponding path program 636 times [2021-07-09 17:38:14,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:14,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055651549] [2021-07-09 17:38:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:14,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:14,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055651549] [2021-07-09 17:38:14,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055651549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:14,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759871428] [2021-07-09 17:38:14,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:14,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:14,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:14,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:38:14,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:14,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759871428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:14,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:14,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:14,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598775537] [2021-07-09 17:38:14,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:14,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:14,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:14,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:14,798 INFO L87 Difference]: Start difference. First operand 338 states and 760 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:15,359 INFO L93 Difference]: Finished difference Result 408 states and 886 transitions. [2021-07-09 17:38:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:15,360 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:15,360 INFO L225 Difference]: With dead ends: 408 [2021-07-09 17:38:15,360 INFO L226 Difference]: Without dead ends: 389 [2021-07-09 17:38:15,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 802.5ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:38:15,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-09 17:38:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 339. [2021-07-09 17:38:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.257396449704142) internal successors, (763), 338 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:15,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 763 transitions. [2021-07-09 17:38:15,363 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 763 transitions. Word has length 20 [2021-07-09 17:38:15,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:15,363 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 763 transitions. [2021-07-09 17:38:15,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 763 transitions. [2021-07-09 17:38:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:15,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:15,363 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:15,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5407,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:15,564 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:15,564 INFO L82 PathProgramCache]: Analyzing trace with hash 529174167, now seen corresponding path program 637 times [2021-07-09 17:38:15,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:15,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108040235] [2021-07-09 17:38:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:15,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:15,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108040235] [2021-07-09 17:38:15,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108040235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:15,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953371004] [2021-07-09 17:38:15,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:15,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:38:15,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:16,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953371004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:16,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:16,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:16,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628510037] [2021-07-09 17:38:16,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:16,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:16,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:16,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:16,385 INFO L87 Difference]: Start difference. First operand 339 states and 763 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:16,772 INFO L93 Difference]: Finished difference Result 360 states and 795 transitions. [2021-07-09 17:38:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:16,772 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:16,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:16,772 INFO L225 Difference]: With dead ends: 360 [2021-07-09 17:38:16,772 INFO L226 Difference]: Without dead ends: 345 [2021-07-09 17:38:16,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 898.4ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:16,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-09 17:38:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2021-07-09 17:38:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.2551319648093844) internal successors, (769), 341 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 769 transitions. [2021-07-09 17:38:16,775 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 769 transitions. Word has length 20 [2021-07-09 17:38:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:16,775 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 769 transitions. [2021-07-09 17:38:16,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 769 transitions. [2021-07-09 17:38:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:16,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:16,776 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:16,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5419 [2021-07-09 17:38:16,976 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:16,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1123779207, now seen corresponding path program 638 times [2021-07-09 17:38:16,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:16,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077045723] [2021-07-09 17:38:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:17,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:17,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077045723] [2021-07-09 17:38:17,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077045723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:17,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623492117] [2021-07-09 17:38:17,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:17,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:17,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:17,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:38:17,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:17,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623492117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:17,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:17,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:17,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219581787] [2021-07-09 17:38:17,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:17,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:17,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:17,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:17,661 INFO L87 Difference]: Start difference. First operand 342 states and 769 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:18,288 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-07-09 17:38:18,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:18,561 INFO L93 Difference]: Finished difference Result 370 states and 811 transitions. [2021-07-09 17:38:18,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:18,561 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:18,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:18,561 INFO L225 Difference]: With dead ends: 370 [2021-07-09 17:38:18,561 INFO L226 Difference]: Without dead ends: 363 [2021-07-09 17:38:18,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1156.4ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:38:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-07-09 17:38:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 343. [2021-07-09 17:38:18,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.257309941520468) internal successors, (772), 342 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 772 transitions. [2021-07-09 17:38:18,564 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 772 transitions. Word has length 20 [2021-07-09 17:38:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:18,564 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 772 transitions. [2021-07-09 17:38:18,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 772 transitions. [2021-07-09 17:38:18,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:18,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:18,565 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:18,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5431,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:18,765 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:18,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:18,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1593846359, now seen corresponding path program 639 times [2021-07-09 17:38:18,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:18,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181169373] [2021-07-09 17:38:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:19,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:19,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181169373] [2021-07-09 17:38:19,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181169373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:19,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345367178] [2021-07-09 17:38:19,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:19,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:38:19,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:19,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:38:19,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:19,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345367178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:19,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:19,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:19,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227058542] [2021-07-09 17:38:19,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:19,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:19,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:19,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:19,504 INFO L87 Difference]: Start difference. First operand 343 states and 772 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:21,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:21,324 INFO L93 Difference]: Finished difference Result 447 states and 939 transitions. [2021-07-09 17:38:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:38:21,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:21,325 INFO L225 Difference]: With dead ends: 447 [2021-07-09 17:38:21,325 INFO L226 Difference]: Without dead ends: 409 [2021-07-09 17:38:21,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1988.1ms TimeCoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:38:21,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-07-09 17:38:21,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 342. [2021-07-09 17:38:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.2551319648093844) internal successors, (769), 341 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 769 transitions. [2021-07-09 17:38:21,328 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 769 transitions. Word has length 20 [2021-07-09 17:38:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:21,328 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 769 transitions. [2021-07-09 17:38:21,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:21,328 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 769 transitions. [2021-07-09 17:38:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:21,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:21,329 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:21,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5446 [2021-07-09 17:38:21,529 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1688053151, now seen corresponding path program 640 times [2021-07-09 17:38:21,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:21,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805212041] [2021-07-09 17:38:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:21,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:21,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805212041] [2021-07-09 17:38:21,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805212041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:21,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602310418] [2021-07-09 17:38:21,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:21,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:21,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:21,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:21,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:22,114 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-07-09 17:38:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:22,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602310418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:22,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:22,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:22,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674666295] [2021-07-09 17:38:22,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:22,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:22,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:22,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:22,282 INFO L87 Difference]: Start difference. First operand 342 states and 769 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:22,742 INFO L93 Difference]: Finished difference Result 361 states and 798 transitions. [2021-07-09 17:38:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:22,742 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:22,742 INFO L225 Difference]: With dead ends: 361 [2021-07-09 17:38:22,742 INFO L226 Difference]: Without dead ends: 348 [2021-07-09 17:38:22,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 890.2ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:38:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-09 17:38:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2021-07-09 17:38:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.253644314868805) internal successors, (773), 343 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-07-09 17:38:22,745 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-07-09 17:38:22,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:22,745 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-07-09 17:38:22,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-07-09 17:38:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:22,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:22,746 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:22,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5461 [2021-07-09 17:38:22,946 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:22,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:22,946 INFO L82 PathProgramCache]: Analyzing trace with hash 110711421, now seen corresponding path program 641 times [2021-07-09 17:38:22,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:22,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046425401] [2021-07-09 17:38:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:23,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:23,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046425401] [2021-07-09 17:38:23,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046425401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031768792] [2021-07-09 17:38:23,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:23,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:23,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:23,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:38:23,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:23,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031768792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:23,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:23,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886909362] [2021-07-09 17:38:23,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:23,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:23,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:23,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:23,636 INFO L87 Difference]: Start difference. First operand 344 states and 773 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:24,667 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2021-07-09 17:38:24,809 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-07-09 17:38:24,950 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-07-09 17:38:25,181 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-07-09 17:38:25,569 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-07-09 17:38:25,719 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-07-09 17:38:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:25,736 INFO L93 Difference]: Finished difference Result 428 states and 906 transitions. [2021-07-09 17:38:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:38:25,736 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:25,737 INFO L225 Difference]: With dead ends: 428 [2021-07-09 17:38:25,737 INFO L226 Difference]: Without dead ends: 396 [2021-07-09 17:38:25,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2331.1ms TimeCoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:38:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-09 17:38:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 343. [2021-07-09 17:38:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.254385964912281) internal successors, (771), 342 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 771 transitions. [2021-07-09 17:38:25,740 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 771 transitions. Word has length 20 [2021-07-09 17:38:25,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:25,740 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 771 transitions. [2021-07-09 17:38:25,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 771 transitions. [2021-07-09 17:38:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:25,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:25,741 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:25,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5472,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:25,941 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:25,941 INFO L82 PathProgramCache]: Analyzing trace with hash 617057687, now seen corresponding path program 642 times [2021-07-09 17:38:25,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:25,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005963607] [2021-07-09 17:38:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:26,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:26,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005963607] [2021-07-09 17:38:26,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005963607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:26,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364876724] [2021-07-09 17:38:26,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:26,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:38:26,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:26,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 17:38:26,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:26,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364876724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:26,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:26,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:26,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459818571] [2021-07-09 17:38:26,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:26,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:26,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:26,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:26,646 INFO L87 Difference]: Start difference. First operand 343 states and 771 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:27,227 INFO L93 Difference]: Finished difference Result 386 states and 839 transitions. [2021-07-09 17:38:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:38:27,227 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:27,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:27,228 INFO L225 Difference]: With dead ends: 386 [2021-07-09 17:38:27,228 INFO L226 Difference]: Without dead ends: 375 [2021-07-09 17:38:27,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 923.0ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:27,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-07-09 17:38:27,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 345. [2021-07-09 17:38:27,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.252906976744186) internal successors, (775), 344 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 775 transitions. [2021-07-09 17:38:27,231 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 775 transitions. Word has length 20 [2021-07-09 17:38:27,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:27,231 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 775 transitions. [2021-07-09 17:38:27,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,231 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 775 transitions. [2021-07-09 17:38:27,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:27,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:27,232 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:27,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5487 [2021-07-09 17:38:27,432 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:27,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1951649017, now seen corresponding path program 643 times [2021-07-09 17:38:27,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:27,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622955725] [2021-07-09 17:38:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:27,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:27,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622955725] [2021-07-09 17:38:27,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622955725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:27,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613331951] [2021-07-09 17:38:27,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:27,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:27,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:27,997 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:38:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:28,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613331951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:28,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:28,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112799248] [2021-07-09 17:38:28,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:28,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:28,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:28,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:28,109 INFO L87 Difference]: Start difference. First operand 345 states and 775 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:28,923 INFO L93 Difference]: Finished difference Result 424 states and 902 transitions. [2021-07-09 17:38:28,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:38:28,923 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:28,924 INFO L225 Difference]: With dead ends: 424 [2021-07-09 17:38:28,924 INFO L226 Difference]: Without dead ends: 405 [2021-07-09 17:38:28,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1024.3ms TimeCoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:38:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-07-09 17:38:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 344. [2021-07-09 17:38:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.253644314868805) internal successors, (773), 343 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-07-09 17:38:28,927 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-07-09 17:38:28,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:28,927 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-07-09 17:38:28,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,927 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-07-09 17:38:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:28,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:28,927 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:29,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5499,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:29,128 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:29,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:29,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1413793439, now seen corresponding path program 644 times [2021-07-09 17:38:29,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:29,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434158518] [2021-07-09 17:38:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:29,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:29,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434158518] [2021-07-09 17:38:29,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434158518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:29,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150747604] [2021-07-09 17:38:29,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:29,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:29,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:29,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:29,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150747604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:29,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:29,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:29,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320812906] [2021-07-09 17:38:29,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:29,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:29,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:29,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:29,748 INFO L87 Difference]: Start difference. First operand 344 states and 773 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:30,508 INFO L93 Difference]: Finished difference Result 416 states and 892 transitions. [2021-07-09 17:38:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:38:30,508 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:30,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:30,509 INFO L225 Difference]: With dead ends: 416 [2021-07-09 17:38:30,509 INFO L226 Difference]: Without dead ends: 394 [2021-07-09 17:38:30,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1007.1ms TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:38:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-09 17:38:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 344. [2021-07-09 17:38:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.253644314868805) internal successors, (773), 343 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-07-09 17:38:30,512 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-07-09 17:38:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:30,512 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-07-09 17:38:30,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-07-09 17:38:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:30,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:30,512 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:30,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5512 [2021-07-09 17:38:30,713 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1339456967, now seen corresponding path program 645 times [2021-07-09 17:38:30,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:30,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62666665] [2021-07-09 17:38:30,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:30,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:30,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62666665] [2021-07-09 17:38:30,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62666665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:30,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156242223] [2021-07-09 17:38:30,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:30,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:38:30,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:30,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:38:30,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:31,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156242223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:31,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:31,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:31,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399997906] [2021-07-09 17:38:31,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:31,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:31,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:31,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:31,392 INFO L87 Difference]: Start difference. First operand 344 states and 773 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:31,841 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-07-09 17:38:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:32,072 INFO L93 Difference]: Finished difference Result 374 states and 819 transitions. [2021-07-09 17:38:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:32,072 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:32,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:32,073 INFO L225 Difference]: With dead ends: 374 [2021-07-09 17:38:32,073 INFO L226 Difference]: Without dead ends: 367 [2021-07-09 17:38:32,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 943.1ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:38:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-09 17:38:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 347. [2021-07-09 17:38:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.254335260115607) internal successors, (780), 346 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 780 transitions. [2021-07-09 17:38:32,076 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 780 transitions. Word has length 20 [2021-07-09 17:38:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:32,076 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 780 transitions. [2021-07-09 17:38:32,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:32,076 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 780 transitions. [2021-07-09 17:38:32,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:32,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:32,076 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:32,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5524,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:32,277 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:32,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:32,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1378168599, now seen corresponding path program 646 times [2021-07-09 17:38:32,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:32,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786783114] [2021-07-09 17:38:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:32,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:32,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786783114] [2021-07-09 17:38:32,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786783114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:32,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136361393] [2021-07-09 17:38:32,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:32,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:32,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:32,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:32,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:33,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136361393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:33,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:33,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:33,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953108155] [2021-07-09 17:38:33,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:33,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:33,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:33,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:33,055 INFO L87 Difference]: Start difference. First operand 347 states and 780 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:33,636 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-07-09 17:38:34,578 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-07-09 17:38:34,772 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-07-09 17:38:34,904 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-07-09 17:38:35,133 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2021-07-09 17:38:35,446 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-07-09 17:38:35,646 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-07-09 17:38:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:35,665 INFO L93 Difference]: Finished difference Result 431 states and 914 transitions. [2021-07-09 17:38:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:38:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:35,666 INFO L225 Difference]: With dead ends: 431 [2021-07-09 17:38:35,666 INFO L226 Difference]: Without dead ends: 400 [2021-07-09 17:38:35,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 2807.8ms TimeCoverageRelationStatistics Valid=249, Invalid=1821, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:38:35,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-09 17:38:35,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 346. [2021-07-09 17:38:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.252173913043478) internal successors, (777), 345 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 777 transitions. [2021-07-09 17:38:35,669 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 777 transitions. Word has length 20 [2021-07-09 17:38:35,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:35,669 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 777 transitions. [2021-07-09 17:38:35,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:35,669 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 777 transitions. [2021-07-09 17:38:35,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:35,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:35,670 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:35,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5539,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:35,870 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:35,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:35,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1884514865, now seen corresponding path program 647 times [2021-07-09 17:38:35,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:35,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431807794] [2021-07-09 17:38:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:36,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:36,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431807794] [2021-07-09 17:38:36,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431807794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:36,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718779790] [2021-07-09 17:38:36,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:36,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:38:36,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:36,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:36,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:36,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718779790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:36,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:36,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:36,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987464750] [2021-07-09 17:38:36,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:36,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:36,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:36,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:36,544 INFO L87 Difference]: Start difference. First operand 346 states and 777 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:37,330 INFO L93 Difference]: Finished difference Result 388 states and 843 transitions. [2021-07-09 17:38:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:37,330 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:37,331 INFO L225 Difference]: With dead ends: 388 [2021-07-09 17:38:37,331 INFO L226 Difference]: Without dead ends: 377 [2021-07-09 17:38:37,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1101.9ms TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:38:37,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-07-09 17:38:37,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 348. [2021-07-09 17:38:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.250720461095101) internal successors, (781), 347 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 781 transitions. [2021-07-09 17:38:37,334 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 781 transitions. Word has length 20 [2021-07-09 17:38:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:37,334 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 781 transitions. [2021-07-09 17:38:37,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,334 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 781 transitions. [2021-07-09 17:38:37,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:37,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:37,334 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:37,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5553 [2021-07-09 17:38:37,534 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:37,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:37,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1075861101, now seen corresponding path program 648 times [2021-07-09 17:38:37,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:37,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802388478] [2021-07-09 17:38:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:37,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:37,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802388478] [2021-07-09 17:38:37,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802388478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:37,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409524064] [2021-07-09 17:38:37,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:37,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:38:37,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:37,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:37,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:38,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409524064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:38,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:38,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:38,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076508646] [2021-07-09 17:38:38,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:38,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:38,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:38,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:38,193 INFO L87 Difference]: Start difference. First operand 348 states and 781 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:39,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:39,277 INFO L93 Difference]: Finished difference Result 416 states and 895 transitions. [2021-07-09 17:38:39,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:38:39,277 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:39,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:39,277 INFO L225 Difference]: With dead ends: 416 [2021-07-09 17:38:39,277 INFO L226 Difference]: Without dead ends: 397 [2021-07-09 17:38:39,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1323.6ms TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:38:39,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-09 17:38:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 347. [2021-07-09 17:38:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.2514450867052025) internal successors, (779), 346 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:39,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 779 transitions. [2021-07-09 17:38:39,281 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 779 transitions. Word has length 20 [2021-07-09 17:38:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:39,281 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 779 transitions. [2021-07-09 17:38:39,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 779 transitions. [2021-07-09 17:38:39,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:39,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:39,281 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:39,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5565,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:39,481 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:39,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1613716679, now seen corresponding path program 649 times [2021-07-09 17:38:39,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:39,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379853807] [2021-07-09 17:38:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:39,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:39,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379853807] [2021-07-09 17:38:39,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379853807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:39,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701385402] [2021-07-09 17:38:39,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:39,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:38:39,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:40,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701385402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:40,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:40,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:40,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688586788] [2021-07-09 17:38:40,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:40,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:40,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:40,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:40,040 INFO L87 Difference]: Start difference. First operand 347 states and 779 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:40,932 INFO L93 Difference]: Finished difference Result 418 states and 896 transitions. [2021-07-09 17:38:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:38:40,932 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:40,932 INFO L225 Difference]: With dead ends: 418 [2021-07-09 17:38:40,932 INFO L226 Difference]: Without dead ends: 396 [2021-07-09 17:38:40,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1028.8ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:38:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-09 17:38:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 347. [2021-07-09 17:38:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.2514450867052025) internal successors, (779), 346 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 779 transitions. [2021-07-09 17:38:40,936 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 779 transitions. Word has length 20 [2021-07-09 17:38:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:40,936 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 779 transitions. [2021-07-09 17:38:40,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 779 transitions. [2021-07-09 17:38:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:40,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:40,936 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:41,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5578,650 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:41,136 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:41,137 INFO L82 PathProgramCache]: Analyzing trace with hash 401379927, now seen corresponding path program 650 times [2021-07-09 17:38:41,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:41,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518325535] [2021-07-09 17:38:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:41,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:41,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518325535] [2021-07-09 17:38:41,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518325535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:41,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569605896] [2021-07-09 17:38:41,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:41,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:41,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:41,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:38:41,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:41,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569605896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:41,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:41,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:41,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980202372] [2021-07-09 17:38:41,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:41,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:41,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:41,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:41,788 INFO L87 Difference]: Start difference. First operand 347 states and 779 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:42,811 INFO L93 Difference]: Finished difference Result 407 states and 874 transitions. [2021-07-09 17:38:42,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:38:42,811 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:42,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:42,812 INFO L225 Difference]: With dead ends: 407 [2021-07-09 17:38:42,812 INFO L226 Difference]: Without dead ends: 375 [2021-07-09 17:38:42,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1258.4ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:38:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-07-09 17:38:42,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 349. [2021-07-09 17:38:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.25) internal successors, (783), 348 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 783 transitions. [2021-07-09 17:38:42,815 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 783 transitions. Word has length 20 [2021-07-09 17:38:42,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:42,815 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 783 transitions. [2021-07-09 17:38:42,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,815 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 783 transitions. [2021-07-09 17:38:42,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:42,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:42,815 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:43,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5590 [2021-07-09 17:38:43,016 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:43,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:43,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1198115679, now seen corresponding path program 651 times [2021-07-09 17:38:43,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:43,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106311919] [2021-07-09 17:38:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:43,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:43,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106311919] [2021-07-09 17:38:43,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106311919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:43,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907493812] [2021-07-09 17:38:43,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:43,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:38:43,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:43,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 17:38:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:43,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907493812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:43,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:43,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:43,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574015744] [2021-07-09 17:38:43,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:43,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:43,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:43,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:43,643 INFO L87 Difference]: Start difference. First operand 349 states and 783 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:44,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:44,386 INFO L93 Difference]: Finished difference Result 417 states and 892 transitions. [2021-07-09 17:38:44,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:38:44,386 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:44,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:44,387 INFO L225 Difference]: With dead ends: 417 [2021-07-09 17:38:44,387 INFO L226 Difference]: Without dead ends: 395 [2021-07-09 17:38:44,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 935.1ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:38:44,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-07-09 17:38:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 348. [2021-07-09 17:38:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.250720461095101) internal successors, (781), 347 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 781 transitions. [2021-07-09 17:38:44,390 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 781 transitions. Word has length 20 [2021-07-09 17:38:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:44,390 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 781 transitions. [2021-07-09 17:38:44,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:44,390 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 781 transitions. [2021-07-09 17:38:44,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:44,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:44,390 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:44,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5605 [2021-07-09 17:38:44,591 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:44,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:44,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1704461945, now seen corresponding path program 652 times [2021-07-09 17:38:44,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:44,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004783234] [2021-07-09 17:38:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:44,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:44,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004783234] [2021-07-09 17:38:44,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004783234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:44,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474091276] [2021-07-09 17:38:44,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:44,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:44,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:44,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:38:44,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:45,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474091276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:45,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:45,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:45,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590849912] [2021-07-09 17:38:45,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:45,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:45,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:45,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:45,152 INFO L87 Difference]: Start difference. First operand 348 states and 781 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:46,103 INFO L93 Difference]: Finished difference Result 422 states and 902 transitions. [2021-07-09 17:38:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:38:46,103 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:46,104 INFO L225 Difference]: With dead ends: 422 [2021-07-09 17:38:46,104 INFO L226 Difference]: Without dead ends: 397 [2021-07-09 17:38:46,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1034.7ms TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:38:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-09 17:38:46,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 348. [2021-07-09 17:38:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.250720461095101) internal successors, (781), 347 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 781 transitions. [2021-07-09 17:38:46,107 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 781 transitions. Word has length 20 [2021-07-09 17:38:46,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:46,107 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 781 transitions. [2021-07-09 17:38:46,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:46,107 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 781 transitions. [2021-07-09 17:38:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:46,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:46,108 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:46,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5618,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:46,308 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:46,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:46,308 INFO L82 PathProgramCache]: Analyzing trace with hash -702990113, now seen corresponding path program 653 times [2021-07-09 17:38:46,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:46,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554443178] [2021-07-09 17:38:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:46,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:46,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554443178] [2021-07-09 17:38:46,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554443178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:46,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327841452] [2021-07-09 17:38:46,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:46,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:38:46,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:46,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:38:46,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:46,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327841452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:46,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:46,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:46,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389043371] [2021-07-09 17:38:46,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:46,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:46,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:46,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:46,998 INFO L87 Difference]: Start difference. First operand 348 states and 781 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:47,404 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-07-09 17:38:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:47,628 INFO L93 Difference]: Finished difference Result 376 states and 823 transitions. [2021-07-09 17:38:47,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:47,628 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:47,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:47,629 INFO L225 Difference]: With dead ends: 376 [2021-07-09 17:38:47,629 INFO L226 Difference]: Without dead ends: 369 [2021-07-09 17:38:47,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 947.8ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:38:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-09 17:38:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 349. [2021-07-09 17:38:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.2528735632183907) internal successors, (784), 348 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 784 transitions. [2021-07-09 17:38:47,632 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 784 transitions. Word has length 20 [2021-07-09 17:38:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:47,632 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 784 transitions. [2021-07-09 17:38:47,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 784 transitions. [2021-07-09 17:38:47,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:47,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:47,632 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:47,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 654 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5630 [2021-07-09 17:38:47,833 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:47,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2014635453, now seen corresponding path program 654 times [2021-07-09 17:38:47,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:47,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034763917] [2021-07-09 17:38:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:48,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:48,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034763917] [2021-07-09 17:38:48,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034763917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:48,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375508955] [2021-07-09 17:38:48,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:48,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:38:48,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:48,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:48,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:48,372 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 17:38:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:48,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375508955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:48,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:48,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:48,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100336023] [2021-07-09 17:38:48,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:48,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:48,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:48,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:48,564 INFO L87 Difference]: Start difference. First operand 349 states and 784 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:49,423 INFO L93 Difference]: Finished difference Result 386 states and 843 transitions. [2021-07-09 17:38:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:38:49,423 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:49,423 INFO L225 Difference]: With dead ends: 386 [2021-07-09 17:38:49,423 INFO L226 Difference]: Without dead ends: 369 [2021-07-09 17:38:49,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1068.0ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:38:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-09 17:38:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 350. [2021-07-09 17:38:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.2492836676217767) internal successors, (785), 349 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 785 transitions. [2021-07-09 17:38:49,426 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 785 transitions. Word has length 20 [2021-07-09 17:38:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:49,426 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 785 transitions. [2021-07-09 17:38:49,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 785 transitions. [2021-07-09 17:38:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:49,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:49,427 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:49,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5645,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:49,627 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:49,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:49,627 INFO L82 PathProgramCache]: Analyzing trace with hash -945740513, now seen corresponding path program 655 times [2021-07-09 17:38:49,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:49,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105857909] [2021-07-09 17:38:49,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:49,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:49,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105857909] [2021-07-09 17:38:49,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105857909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:49,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571844165] [2021-07-09 17:38:49,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:49,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:49,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:50,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571844165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:50,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:50,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:50,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9641648] [2021-07-09 17:38:50,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:50,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:50,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:50,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:50,347 INFO L87 Difference]: Start difference. First operand 350 states and 785 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:50,698 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-07-09 17:38:51,036 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-07-09 17:38:51,297 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-07-09 17:38:51,732 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2021-07-09 17:38:51,891 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-07-09 17:38:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:51,901 INFO L93 Difference]: Finished difference Result 406 states and 878 transitions. [2021-07-09 17:38:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:38:51,901 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:51,902 INFO L225 Difference]: With dead ends: 406 [2021-07-09 17:38:51,902 INFO L226 Difference]: Without dead ends: 382 [2021-07-09 17:38:51,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1781.1ms TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:38:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-07-09 17:38:51,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 351. [2021-07-09 17:38:51,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.2514285714285713) internal successors, (788), 350 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:51,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 788 transitions. [2021-07-09 17:38:51,905 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 788 transitions. Word has length 20 [2021-07-09 17:38:51,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:51,905 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 788 transitions. [2021-07-09 17:38:51,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:51,905 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 788 transitions. [2021-07-09 17:38:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:51,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:51,906 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:52,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5657,656 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:52,106 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:52,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:52,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1773985577, now seen corresponding path program 656 times [2021-07-09 17:38:52,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:52,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989696576] [2021-07-09 17:38:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:52,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:52,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989696576] [2021-07-09 17:38:52,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989696576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:52,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484424475] [2021-07-09 17:38:52,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:52,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:52,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:52,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:38:52,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:52,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484424475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:52,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:52,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:52,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813296101] [2021-07-09 17:38:52,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:52,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:52,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:52,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:52,795 INFO L87 Difference]: Start difference. First operand 351 states and 788 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:53,799 INFO L93 Difference]: Finished difference Result 402 states and 871 transitions. [2021-07-09 17:38:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:38:53,799 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:53,799 INFO L225 Difference]: With dead ends: 402 [2021-07-09 17:38:53,799 INFO L226 Difference]: Without dead ends: 377 [2021-07-09 17:38:53,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1207.3ms TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:38:53,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-07-09 17:38:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 351. [2021-07-09 17:38:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.2514285714285713) internal successors, (788), 350 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 788 transitions. [2021-07-09 17:38:53,802 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 788 transitions. Word has length 20 [2021-07-09 17:38:53,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:53,803 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 788 transitions. [2021-07-09 17:38:53,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,803 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 788 transitions. [2021-07-09 17:38:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:53,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:53,803 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:54,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5668 [2021-07-09 17:38:54,003 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:54,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:54,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1817095683, now seen corresponding path program 657 times [2021-07-09 17:38:54,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:54,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873709235] [2021-07-09 17:38:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:54,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:54,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873709235] [2021-07-09 17:38:54,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873709235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:54,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670108269] [2021-07-09 17:38:54,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:54,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:38:54,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:54,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 17:38:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:54,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670108269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:54,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:54,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:54,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044362887] [2021-07-09 17:38:54,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:54,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:54,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:54,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:54,703 INFO L87 Difference]: Start difference. First operand 351 states and 788 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:55,543 INFO L93 Difference]: Finished difference Result 404 states and 870 transitions. [2021-07-09 17:38:55,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:38:55,543 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:55,544 INFO L225 Difference]: With dead ends: 404 [2021-07-09 17:38:55,544 INFO L226 Difference]: Without dead ends: 375 [2021-07-09 17:38:55,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1142.9ms TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:38:55,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-07-09 17:38:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 352. [2021-07-09 17:38:55,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.247863247863248) internal successors, (789), 351 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 789 transitions. [2021-07-09 17:38:55,547 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 789 transitions. Word has length 20 [2021-07-09 17:38:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:55,547 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 789 transitions. [2021-07-09 17:38:55,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 789 transitions. [2021-07-09 17:38:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:55,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:55,548 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:55,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5683 [2021-07-09 17:38:55,748 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:55,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1037846781, now seen corresponding path program 658 times [2021-07-09 17:38:55,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:55,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550204402] [2021-07-09 17:38:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:56,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:56,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550204402] [2021-07-09 17:38:56,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550204402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:56,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905504340] [2021-07-09 17:38:56,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:56,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:56,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:56,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:38:56,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:56,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905504340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:56,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:56,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:56,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044422622] [2021-07-09 17:38:56,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:56,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:56,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:56,444 INFO L87 Difference]: Start difference. First operand 352 states and 789 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:57,454 INFO L93 Difference]: Finished difference Result 412 states and 884 transitions. [2021-07-09 17:38:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:38:57,454 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:57,454 INFO L225 Difference]: With dead ends: 412 [2021-07-09 17:38:57,454 INFO L226 Difference]: Without dead ends: 380 [2021-07-09 17:38:57,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1264.3ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:38:57,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-07-09 17:38:57,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 354. [2021-07-09 17:38:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.2464589235127477) internal successors, (793), 353 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 793 transitions. [2021-07-09 17:38:57,457 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 793 transitions. Word has length 20 [2021-07-09 17:38:57,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:57,458 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 793 transitions. [2021-07-09 17:38:57,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,458 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 793 transitions. [2021-07-09 17:38:57,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:57,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:57,458 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:57,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5697,659 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:57,659 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:57,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1834582533, now seen corresponding path program 659 times [2021-07-09 17:38:57,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:57,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30126105] [2021-07-09 17:38:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:57,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:57,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30126105] [2021-07-09 17:38:57,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30126105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:57,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459031945] [2021-07-09 17:38:57,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:57,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:38:57,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:57,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:57,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:58,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459031945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:58,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:38:58,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326449384] [2021-07-09 17:38:58,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:38:58,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:58,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:38:58,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:58,291 INFO L87 Difference]: Start difference. First operand 354 states and 793 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:59,195 INFO L93 Difference]: Finished difference Result 426 states and 910 transitions. [2021-07-09 17:38:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:38:59,195 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:38:59,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:59,196 INFO L225 Difference]: With dead ends: 426 [2021-07-09 17:38:59,196 INFO L226 Difference]: Without dead ends: 383 [2021-07-09 17:38:59,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1157.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:38:59,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-07-09 17:38:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 356. [2021-07-09 17:38:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.2450704225352114) internal successors, (797), 355 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 797 transitions. [2021-07-09 17:38:59,200 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 797 transitions. Word has length 20 [2021-07-09 17:38:59,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:59,200 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 797 transitions. [2021-07-09 17:38:59,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 797 transitions. [2021-07-09 17:38:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:38:59,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:59,201 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:59,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5712,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:59,401 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:59,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1954038497, now seen corresponding path program 660 times [2021-07-09 17:38:59,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:59,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536109081] [2021-07-09 17:38:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:59,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:59,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536109081] [2021-07-09 17:38:59,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536109081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:59,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240748691] [2021-07-09 17:38:59,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:59,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:38:59,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:59,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:38:59,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:00,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240748691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:00,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:00,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:00,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215858699] [2021-07-09 17:39:00,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:00,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:00,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:00,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:00,094 INFO L87 Difference]: Start difference. First operand 356 states and 797 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:01,014 INFO L93 Difference]: Finished difference Result 430 states and 918 transitions. [2021-07-09 17:39:01,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:39:01,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:01,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:01,015 INFO L225 Difference]: With dead ends: 430 [2021-07-09 17:39:01,015 INFO L226 Difference]: Without dead ends: 405 [2021-07-09 17:39:01,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1190.2ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:39:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-07-09 17:39:01,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 356. [2021-07-09 17:39:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.2450704225352114) internal successors, (797), 355 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 797 transitions. [2021-07-09 17:39:01,018 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 797 transitions. Word has length 20 [2021-07-09 17:39:01,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:01,018 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 797 transitions. [2021-07-09 17:39:01,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 797 transitions. [2021-07-09 17:39:01,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:01,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:01,018 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:01,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5724,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:01,219 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:01,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:01,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1989663337, now seen corresponding path program 661 times [2021-07-09 17:39:01,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:01,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387715245] [2021-07-09 17:39:01,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:01,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:01,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387715245] [2021-07-09 17:39:01,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387715245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:01,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311466173] [2021-07-09 17:39:01,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:01,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:39:01,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:01,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311466173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:01,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:01,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:01,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081302429] [2021-07-09 17:39:01,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:01,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:01,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:01,865 INFO L87 Difference]: Start difference. First operand 356 states and 797 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:02,836 INFO L93 Difference]: Finished difference Result 417 states and 894 transitions. [2021-07-09 17:39:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:39:02,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:02,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:02,837 INFO L225 Difference]: With dead ends: 417 [2021-07-09 17:39:02,837 INFO L226 Difference]: Without dead ends: 385 [2021-07-09 17:39:02,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1183.8ms TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:39:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-07-09 17:39:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 359. [2021-07-09 17:39:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.2430167597765363) internal successors, (803), 358 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 803 transitions. [2021-07-09 17:39:02,840 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 803 transitions. Word has length 20 [2021-07-09 17:39:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:02,840 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 803 transitions. [2021-07-09 17:39:02,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 803 transitions. [2021-07-09 17:39:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:02,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:02,840 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:03,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5736 [2021-07-09 17:39:03,041 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:03,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:03,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1192927585, now seen corresponding path program 662 times [2021-07-09 17:39:03,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:03,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499165240] [2021-07-09 17:39:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:03,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:03,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499165240] [2021-07-09 17:39:03,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499165240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:03,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361258688] [2021-07-09 17:39:03,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:03,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:03,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:39:03,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:03,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361258688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:03,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:03,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:03,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664898915] [2021-07-09 17:39:03,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:03,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:03,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:03,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:03,742 INFO L87 Difference]: Start difference. First operand 359 states and 803 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:04,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:04,847 INFO L93 Difference]: Finished difference Result 431 states and 922 transitions. [2021-07-09 17:39:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:39:04,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:04,848 INFO L225 Difference]: With dead ends: 431 [2021-07-09 17:39:04,848 INFO L226 Difference]: Without dead ends: 390 [2021-07-09 17:39:04,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1349.1ms TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:39:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-09 17:39:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 361. [2021-07-09 17:39:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.2444444444444445) internal successors, (808), 360 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:04,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 808 transitions. [2021-07-09 17:39:04,851 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 808 transitions. Word has length 20 [2021-07-09 17:39:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:04,851 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 808 transitions. [2021-07-09 17:39:04,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 808 transitions. [2021-07-09 17:39:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:04,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:04,852 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:05,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5751,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:05,052 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:05,052 INFO L82 PathProgramCache]: Analyzing trace with hash -686581319, now seen corresponding path program 663 times [2021-07-09 17:39:05,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:05,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17428567] [2021-07-09 17:39:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:05,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:05,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17428567] [2021-07-09 17:39:05,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17428567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:05,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904462159] [2021-07-09 17:39:05,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:05,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:39:05,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:05,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:39:05,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:05,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904462159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:05,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:05,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:05,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142894468] [2021-07-09 17:39:05,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:05,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:05,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:05,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:05,656 INFO L87 Difference]: Start difference. First operand 361 states and 808 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:06,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:06,473 INFO L93 Difference]: Finished difference Result 431 states and 921 transitions. [2021-07-09 17:39:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:06,474 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:06,474 INFO L225 Difference]: With dead ends: 431 [2021-07-09 17:39:06,474 INFO L226 Difference]: Without dead ends: 406 [2021-07-09 17:39:06,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 969.5ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:39:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-07-09 17:39:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 361. [2021-07-09 17:39:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.2444444444444445) internal successors, (808), 360 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 808 transitions. [2021-07-09 17:39:06,477 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 808 transitions. Word has length 20 [2021-07-09 17:39:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:06,478 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 808 transitions. [2021-07-09 17:39:06,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 808 transitions. [2021-07-09 17:39:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:06,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:06,478 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:06,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5764,664 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:06,678 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:06,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:06,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2125251039, now seen corresponding path program 664 times [2021-07-09 17:39:06,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:06,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321379950] [2021-07-09 17:39:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:06,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:06,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321379950] [2021-07-09 17:39:06,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321379950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:06,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647027387] [2021-07-09 17:39:06,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:06,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:06,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:06,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:39:06,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:07,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647027387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:07,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:07,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:07,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292821978] [2021-07-09 17:39:07,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:07,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:07,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:07,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:07,278 INFO L87 Difference]: Start difference. First operand 361 states and 808 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:08,402 INFO L93 Difference]: Finished difference Result 435 states and 929 transitions. [2021-07-09 17:39:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:39:08,403 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:08,403 INFO L225 Difference]: With dead ends: 435 [2021-07-09 17:39:08,403 INFO L226 Difference]: Without dead ends: 407 [2021-07-09 17:39:08,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1238.0ms TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:39:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-07-09 17:39:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 362. [2021-07-09 17:39:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.2437673130193905) internal successors, (810), 361 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 810 transitions. [2021-07-09 17:39:08,406 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 810 transitions. Word has length 20 [2021-07-09 17:39:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:08,406 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 810 transitions. [2021-07-09 17:39:08,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 810 transitions. [2021-07-09 17:39:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:08,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:08,407 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:08,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5776,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:08,607 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:08,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1847613177, now seen corresponding path program 665 times [2021-07-09 17:39:08,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:08,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109099537] [2021-07-09 17:39:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:08,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:08,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109099537] [2021-07-09 17:39:08,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109099537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:08,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073389996] [2021-07-09 17:39:08,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:08,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:39:08,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:08,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:39:08,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:09,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073389996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:09,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:09,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:09,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813457975] [2021-07-09 17:39:09,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:09,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:09,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:09,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:09,301 INFO L87 Difference]: Start difference. First operand 362 states and 810 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:09,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:09,685 INFO L93 Difference]: Finished difference Result 382 states and 841 transitions. [2021-07-09 17:39:09,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:09,686 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:09,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:09,686 INFO L225 Difference]: With dead ends: 382 [2021-07-09 17:39:09,686 INFO L226 Difference]: Without dead ends: 369 [2021-07-09 17:39:09,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 709.9ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:39:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-09 17:39:09,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2021-07-09 17:39:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.241095890410959) internal successors, (818), 365 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 818 transitions. [2021-07-09 17:39:09,689 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 818 transitions. Word has length 20 [2021-07-09 17:39:09,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:09,689 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 818 transitions. [2021-07-09 17:39:09,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:09,690 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 818 transitions. [2021-07-09 17:39:09,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:09,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:09,690 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:09,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5789 [2021-07-09 17:39:09,890 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:09,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:09,891 INFO L82 PathProgramCache]: Analyzing trace with hash 270271447, now seen corresponding path program 666 times [2021-07-09 17:39:09,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:09,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827969221] [2021-07-09 17:39:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:10,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:10,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827969221] [2021-07-09 17:39:10,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827969221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:10,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481321530] [2021-07-09 17:39:10,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:10,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:39:10,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:10,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:39:10,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:10,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481321530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:10,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:10,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:10,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639559863] [2021-07-09 17:39:10,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:10,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:10,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:10,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:10,628 INFO L87 Difference]: Start difference. First operand 366 states and 818 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:11,340 INFO L93 Difference]: Finished difference Result 406 states and 880 transitions. [2021-07-09 17:39:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:11,340 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:11,341 INFO L225 Difference]: With dead ends: 406 [2021-07-09 17:39:11,341 INFO L226 Difference]: Without dead ends: 395 [2021-07-09 17:39:11,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1025.8ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:39:11,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-07-09 17:39:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 367. [2021-07-09 17:39:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.240437158469945) internal successors, (820), 366 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:11,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 820 transitions. [2021-07-09 17:39:11,344 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 820 transitions. Word has length 20 [2021-07-09 17:39:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:11,344 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 820 transitions. [2021-07-09 17:39:11,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 820 transitions. [2021-07-09 17:39:11,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:11,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:11,344 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:11,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5801,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:11,545 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:11,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:11,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1604862777, now seen corresponding path program 667 times [2021-07-09 17:39:11,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:11,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062204228] [2021-07-09 17:39:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:11,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:11,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062204228] [2021-07-09 17:39:11,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062204228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:11,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008072487] [2021-07-09 17:39:11,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:11,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:39:11,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:12,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008072487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:12,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:12,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:12,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141060953] [2021-07-09 17:39:12,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:12,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:12,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:12,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:12,195 INFO L87 Difference]: Start difference. First operand 367 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:13,316 INFO L93 Difference]: Finished difference Result 455 states and 963 transitions. [2021-07-09 17:39:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:39:13,316 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:13,316 INFO L225 Difference]: With dead ends: 455 [2021-07-09 17:39:13,316 INFO L226 Difference]: Without dead ends: 429 [2021-07-09 17:39:13,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1245.6ms TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:39:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-09 17:39:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 365. [2021-07-09 17:39:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.241758241758242) internal successors, (816), 364 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 816 transitions. [2021-07-09 17:39:13,320 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 816 transitions. Word has length 20 [2021-07-09 17:39:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:13,320 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 816 transitions. [2021-07-09 17:39:13,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 816 transitions. [2021-07-09 17:39:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:13,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:13,320 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:13,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5813,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:13,521 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:13,521 INFO L82 PathProgramCache]: Analyzing trace with hash 776617713, now seen corresponding path program 668 times [2021-07-09 17:39:13,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:13,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217619957] [2021-07-09 17:39:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:13,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:13,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217619957] [2021-07-09 17:39:13,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217619957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:13,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276995475] [2021-07-09 17:39:13,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:13,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:13,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:13,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:39:13,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:14,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276995475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:14,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:14,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:14,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402958387] [2021-07-09 17:39:14,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:14,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:14,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:14,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:14,169 INFO L87 Difference]: Start difference. First operand 365 states and 816 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:15,295 INFO L93 Difference]: Finished difference Result 417 states and 901 transitions. [2021-07-09 17:39:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:39:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:15,296 INFO L225 Difference]: With dead ends: 417 [2021-07-09 17:39:15,296 INFO L226 Difference]: Without dead ends: 392 [2021-07-09 17:39:15,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1297.1ms TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:39:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-07-09 17:39:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 366. [2021-07-09 17:39:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.241095890410959) internal successors, (818), 365 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 818 transitions. [2021-07-09 17:39:15,299 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 818 transitions. Word has length 20 [2021-07-09 17:39:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:15,299 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 818 transitions. [2021-07-09 17:39:15,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 818 transitions. [2021-07-09 17:39:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:15,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:15,299 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:15,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5825 [2021-07-09 17:39:15,500 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:15,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1573353465, now seen corresponding path program 669 times [2021-07-09 17:39:15,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:15,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661372751] [2021-07-09 17:39:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:15,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:15,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661372751] [2021-07-09 17:39:15,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661372751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:15,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300171927] [2021-07-09 17:39:15,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:15,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:39:15,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:15,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 17:39:15,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:16,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300171927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:16,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:16,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:16,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049294953] [2021-07-09 17:39:16,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:16,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:16,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:16,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:16,085 INFO L87 Difference]: Start difference. First operand 366 states and 818 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:16,720 INFO L93 Difference]: Finished difference Result 435 states and 929 transitions. [2021-07-09 17:39:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:39:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:16,720 INFO L225 Difference]: With dead ends: 435 [2021-07-09 17:39:16,720 INFO L226 Difference]: Without dead ends: 413 [2021-07-09 17:39:16,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 753.4ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:16,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-07-09 17:39:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 365. [2021-07-09 17:39:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.241758241758242) internal successors, (816), 364 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 816 transitions. [2021-07-09 17:39:16,724 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 816 transitions. Word has length 20 [2021-07-09 17:39:16,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:16,724 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 816 transitions. [2021-07-09 17:39:16,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:16,724 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 816 transitions. [2021-07-09 17:39:16,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:16,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:16,724 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:16,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5840,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:16,925 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:16,925 INFO L82 PathProgramCache]: Analyzing trace with hash -706517225, now seen corresponding path program 670 times [2021-07-09 17:39:16,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:16,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212692439] [2021-07-09 17:39:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:17,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:17,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212692439] [2021-07-09 17:39:17,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212692439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:17,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959413367] [2021-07-09 17:39:17,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:17,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:17,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:17,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:39:17,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:17,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959413367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:17,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:17,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:17,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392395392] [2021-07-09 17:39:17,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:17,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:17,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:17,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:17,670 INFO L87 Difference]: Start difference. First operand 365 states and 816 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:18,873 INFO L93 Difference]: Finished difference Result 418 states and 903 transitions. [2021-07-09 17:39:18,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:39:18,873 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:18,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:18,873 INFO L225 Difference]: With dead ends: 418 [2021-07-09 17:39:18,873 INFO L226 Difference]: Without dead ends: 393 [2021-07-09 17:39:18,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1455.2ms TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:39:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-09 17:39:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 367. [2021-07-09 17:39:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.240437158469945) internal successors, (820), 366 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 820 transitions. [2021-07-09 17:39:18,876 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 820 transitions. Word has length 20 [2021-07-09 17:39:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:18,876 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 820 transitions. [2021-07-09 17:39:18,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 820 transitions. [2021-07-09 17:39:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:18,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:18,877 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:19,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5852,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:19,077 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:19,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:19,078 INFO L82 PathProgramCache]: Analyzing trace with hash 90218527, now seen corresponding path program 671 times [2021-07-09 17:39:19,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:19,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081454820] [2021-07-09 17:39:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:19,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:19,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081454820] [2021-07-09 17:39:19,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081454820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:19,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249226700] [2021-07-09 17:39:19,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:19,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:39:19,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:19,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:39:19,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:19,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249226700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:19,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:19,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:19,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214567618] [2021-07-09 17:39:19,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:19,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:19,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:19,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:19,678 INFO L87 Difference]: Start difference. First operand 367 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:20,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:20,567 INFO L93 Difference]: Finished difference Result 439 states and 937 transitions. [2021-07-09 17:39:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:39:20,567 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:20,567 INFO L225 Difference]: With dead ends: 439 [2021-07-09 17:39:20,567 INFO L226 Difference]: Without dead ends: 396 [2021-07-09 17:39:20,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1076.3ms TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:39:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-09 17:39:20,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 366. [2021-07-09 17:39:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.241095890410959) internal successors, (818), 365 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 818 transitions. [2021-07-09 17:39:20,571 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 818 transitions. Word has length 20 [2021-07-09 17:39:20,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:20,571 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 818 transitions. [2021-07-09 17:39:20,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:20,571 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 818 transitions. [2021-07-09 17:39:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:20,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:20,571 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:20,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5866,672 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:20,771 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:20,772 INFO L82 PathProgramCache]: Analyzing trace with hash 596564793, now seen corresponding path program 672 times [2021-07-09 17:39:20,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:20,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919734053] [2021-07-09 17:39:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:20,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:20,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919734053] [2021-07-09 17:39:20,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919734053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:20,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470428550] [2021-07-09 17:39:20,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:20,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:20,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:39:20,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:21,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470428550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:21,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:21,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:21,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070741614] [2021-07-09 17:39:21,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:21,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:21,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:21,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:21,401 INFO L87 Difference]: Start difference. First operand 366 states and 818 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:22,159 INFO L93 Difference]: Finished difference Result 440 states and 939 transitions. [2021-07-09 17:39:22,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:39:22,159 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:22,159 INFO L225 Difference]: With dead ends: 440 [2021-07-09 17:39:22,160 INFO L226 Difference]: Without dead ends: 415 [2021-07-09 17:39:22,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 933.4ms TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:39:22,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-07-09 17:39:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 365. [2021-07-09 17:39:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.241758241758242) internal successors, (816), 364 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 816 transitions. [2021-07-09 17:39:22,163 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 816 transitions. Word has length 20 [2021-07-09 17:39:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:22,163 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 816 transitions. [2021-07-09 17:39:22,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:22,163 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 816 transitions. [2021-07-09 17:39:22,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:22,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:22,163 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:22,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5878,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:22,364 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:22,364 INFO L82 PathProgramCache]: Analyzing trace with hash 560939953, now seen corresponding path program 673 times [2021-07-09 17:39:22,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:22,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045464201] [2021-07-09 17:39:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:22,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:22,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045464201] [2021-07-09 17:39:22,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045464201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:22,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885661363] [2021-07-09 17:39:22,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:22,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:39:22,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:23,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885661363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:23,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:23,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:23,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425163349] [2021-07-09 17:39:23,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:23,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:23,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:23,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:23,068 INFO L87 Difference]: Start difference. First operand 365 states and 816 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:23,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:23,957 INFO L93 Difference]: Finished difference Result 419 states and 905 transitions. [2021-07-09 17:39:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:39:23,957 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:23,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:23,958 INFO L225 Difference]: With dead ends: 419 [2021-07-09 17:39:23,958 INFO L226 Difference]: Without dead ends: 394 [2021-07-09 17:39:23,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1160.2ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:39:23,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-09 17:39:23,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 368. [2021-07-09 17:39:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.239782016348774) internal successors, (822), 367 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 822 transitions. [2021-07-09 17:39:23,961 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 822 transitions. Word has length 20 [2021-07-09 17:39:23,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:23,961 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 822 transitions. [2021-07-09 17:39:23,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:23,961 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 822 transitions. [2021-07-09 17:39:23,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:23,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:23,962 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:24,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5890 [2021-07-09 17:39:24,162 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:24,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:24,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1357675705, now seen corresponding path program 674 times [2021-07-09 17:39:24,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:24,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364527765] [2021-07-09 17:39:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:24,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:24,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364527765] [2021-07-09 17:39:24,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364527765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:24,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601674314] [2021-07-09 17:39:24,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:24,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:24,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:24,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:39:24,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:24,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601674314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:24,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:24,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:24,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509455219] [2021-07-09 17:39:24,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:24,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:24,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:24,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:24,769 INFO L87 Difference]: Start difference. First operand 368 states and 822 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:25,505 INFO L93 Difference]: Finished difference Result 439 states and 939 transitions. [2021-07-09 17:39:25,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:39:25,505 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:25,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:25,506 INFO L225 Difference]: With dead ends: 439 [2021-07-09 17:39:25,506 INFO L226 Difference]: Without dead ends: 417 [2021-07-09 17:39:25,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 953.5ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:39:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-09 17:39:25,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 367. [2021-07-09 17:39:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.240437158469945) internal successors, (820), 366 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 820 transitions. [2021-07-09 17:39:25,509 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 820 transitions. Word has length 20 [2021-07-09 17:39:25,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:25,509 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 820 transitions. [2021-07-09 17:39:25,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 820 transitions. [2021-07-09 17:39:25,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:25,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:25,509 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:25,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5902,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:25,710 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:25,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:25,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1864021971, now seen corresponding path program 675 times [2021-07-09 17:39:25,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:25,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699822411] [2021-07-09 17:39:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:25,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:25,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699822411] [2021-07-09 17:39:25,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699822411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:25,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75214809] [2021-07-09 17:39:25,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:25,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:39:25,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:25,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:39:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:26,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75214809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:26,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:26,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:26,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733243518] [2021-07-09 17:39:26,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:26,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:26,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:26,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:26,318 INFO L87 Difference]: Start difference. First operand 367 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:27,438 INFO L93 Difference]: Finished difference Result 464 states and 980 transitions. [2021-07-09 17:39:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:39:27,438 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:27,439 INFO L225 Difference]: With dead ends: 464 [2021-07-09 17:39:27,439 INFO L226 Difference]: Without dead ends: 404 [2021-07-09 17:39:27,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1302.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:39:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-07-09 17:39:27,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 370. [2021-07-09 17:39:27,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.238482384823848) internal successors, (826), 369 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 826 transitions. [2021-07-09 17:39:27,442 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 826 transitions. Word has length 20 [2021-07-09 17:39:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:27,442 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 826 transitions. [2021-07-09 17:39:27,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 826 transitions. [2021-07-09 17:39:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:27,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:27,442 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:27,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5914 [2021-07-09 17:39:27,643 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:27,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:27,643 INFO L82 PathProgramCache]: Analyzing trace with hash 380887033, now seen corresponding path program 676 times [2021-07-09 17:39:27,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:27,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365168401] [2021-07-09 17:39:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:27,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:27,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365168401] [2021-07-09 17:39:27,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365168401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:27,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983397461] [2021-07-09 17:39:27,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:27,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:27,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:27,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:39:27,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:28,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983397461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:28,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:28,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 17:39:28,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552936507] [2021-07-09 17:39:28,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:39:28,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:39:28,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:28,260 INFO L87 Difference]: Start difference. First operand 370 states and 826 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:29,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:29,392 INFO L93 Difference]: Finished difference Result 445 states and 949 transitions. [2021-07-09 17:39:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:39:29,392 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:29,393 INFO L225 Difference]: With dead ends: 445 [2021-07-09 17:39:29,393 INFO L226 Difference]: Without dead ends: 417 [2021-07-09 17:39:29,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1219.0ms TimeCoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:39:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-09 17:39:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 370. [2021-07-09 17:39:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.238482384823848) internal successors, (826), 369 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 826 transitions. [2021-07-09 17:39:29,396 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 826 transitions. Word has length 20 [2021-07-09 17:39:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:29,396 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 826 transitions. [2021-07-09 17:39:29,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:29,396 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 826 transitions. [2021-07-09 17:39:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:29,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:29,396 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:29,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5926,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:29,597 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:29,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1197406807, now seen corresponding path program 677 times [2021-07-09 17:39:29,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:29,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676045230] [2021-07-09 17:39:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:29,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:29,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676045230] [2021-07-09 17:39:29,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676045230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:29,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795894845] [2021-07-09 17:39:29,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:29,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:39:29,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:29,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:39:29,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:30,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795894845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:30,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:30,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:39:30,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389775764] [2021-07-09 17:39:30,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:39:30,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:30,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:39:30,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:30,325 INFO L87 Difference]: Start difference. First operand 370 states and 826 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:30,898 INFO L93 Difference]: Finished difference Result 405 states and 886 transitions. [2021-07-09 17:39:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:30,899 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:30,899 INFO L225 Difference]: With dead ends: 405 [2021-07-09 17:39:30,899 INFO L226 Difference]: Without dead ends: 394 [2021-07-09 17:39:30,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 902.8ms TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:39:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-09 17:39:30,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 375. [2021-07-09 17:39:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 2.235294117647059) internal successors, (836), 374 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 836 transitions. [2021-07-09 17:39:30,902 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 836 transitions. Word has length 20 [2021-07-09 17:39:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:30,903 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 836 transitions. [2021-07-09 17:39:30,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 836 transitions. [2021-07-09 17:39:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:30,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:30,903 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:31,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5939 [2021-07-09 17:39:31,103 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:31,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:31,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1762969159, now seen corresponding path program 678 times [2021-07-09 17:39:31,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:31,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66022827] [2021-07-09 17:39:31,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:31,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:31,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66022827] [2021-07-09 17:39:31,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66022827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:31,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822475938] [2021-07-09 17:39:31,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:31,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:39:31,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:31,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:39:31,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:31,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822475938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:31,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:31,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:39:31,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437562555] [2021-07-09 17:39:31,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:39:31,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:39:31,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:31,758 INFO L87 Difference]: Start difference. First operand 375 states and 836 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:32,544 INFO L93 Difference]: Finished difference Result 452 states and 959 transitions. [2021-07-09 17:39:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:39:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:32,544 INFO L225 Difference]: With dead ends: 452 [2021-07-09 17:39:32,544 INFO L226 Difference]: Without dead ends: 433 [2021-07-09 17:39:32,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 996.7ms TimeCoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:39:32,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-09 17:39:32,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 374. [2021-07-09 17:39:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.2359249329758715) internal successors, (834), 373 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 834 transitions. [2021-07-09 17:39:32,548 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 834 transitions. Word has length 20 [2021-07-09 17:39:32,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:32,548 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 834 transitions. [2021-07-09 17:39:32,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:32,548 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 834 transitions. [2021-07-09 17:39:32,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:32,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:32,549 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:32,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5951,679 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:32,749 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:32,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1994142559, now seen corresponding path program 679 times [2021-07-09 17:39:32,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:32,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295235102] [2021-07-09 17:39:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:32,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:32,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295235102] [2021-07-09 17:39:32,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295235102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:32,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181837025] [2021-07-09 17:39:32,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:32,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:39:32,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:33,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181837025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:33,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:33,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:39:33,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144961961] [2021-07-09 17:39:33,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:39:33,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:33,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:39:33,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:33,302 INFO L87 Difference]: Start difference. First operand 374 states and 834 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:34,182 INFO L93 Difference]: Finished difference Result 448 states and 959 transitions. [2021-07-09 17:39:34,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:39:34,182 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:34,182 INFO L225 Difference]: With dead ends: 448 [2021-07-09 17:39:34,182 INFO L226 Difference]: Without dead ends: 429 [2021-07-09 17:39:34,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1014.2ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:39:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-09 17:39:34,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 373. [2021-07-09 17:39:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.236559139784946) internal successors, (832), 372 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 832 transitions. [2021-07-09 17:39:34,186 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 832 transitions. Word has length 20 [2021-07-09 17:39:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:34,186 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 832 transitions. [2021-07-09 17:39:34,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 832 transitions. [2021-07-09 17:39:34,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:34,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:34,186 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:34,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5964,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:34,387 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:34,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:34,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1794478471, now seen corresponding path program 680 times [2021-07-09 17:39:34,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:34,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561964474] [2021-07-09 17:39:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:34,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:34,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561964474] [2021-07-09 17:39:34,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561964474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:34,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541413769] [2021-07-09 17:39:34,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:34,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:34,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:34,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:39:34,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:35,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541413769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:35,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:35,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:39:35,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271511785] [2021-07-09 17:39:35,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:39:35,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:35,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:39:35,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:35,017 INFO L87 Difference]: Start difference. First operand 373 states and 832 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:35,954 INFO L93 Difference]: Finished difference Result 454 states and 960 transitions. [2021-07-09 17:39:35,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:39:35,954 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:35,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:35,955 INFO L225 Difference]: With dead ends: 454 [2021-07-09 17:39:35,955 INFO L226 Difference]: Without dead ends: 419 [2021-07-09 17:39:35,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1111.9ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:39:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-07-09 17:39:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 373. [2021-07-09 17:39:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.236559139784946) internal successors, (832), 372 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 832 transitions. [2021-07-09 17:39:35,958 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 832 transitions. Word has length 20 [2021-07-09 17:39:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:35,958 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 832 transitions. [2021-07-09 17:39:35,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 832 transitions. [2021-07-09 17:39:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:35,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:35,959 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:36,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5976,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:36,159 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:36,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:36,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1017353887, now seen corresponding path program 681 times [2021-07-09 17:39:36,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:36,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284985934] [2021-07-09 17:39:36,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:36,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:36,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284985934] [2021-07-09 17:39:36,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284985934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:36,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698008689] [2021-07-09 17:39:36,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:36,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:39:36,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:36,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:39:36,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:36,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698008689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:36,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:36,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:39:36,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786214487] [2021-07-09 17:39:36,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:39:36,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:36,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:39:36,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:36,883 INFO L87 Difference]: Start difference. First operand 373 states and 832 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:37,970 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-07-09 17:39:38,200 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-07-09 17:39:38,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:38,344 INFO L93 Difference]: Finished difference Result 462 states and 978 transitions. [2021-07-09 17:39:38,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:39:38,345 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:38,345 INFO L225 Difference]: With dead ends: 462 [2021-07-09 17:39:38,345 INFO L226 Difference]: Without dead ends: 434 [2021-07-09 17:39:38,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1639.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:39:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-07-09 17:39:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 373. [2021-07-09 17:39:38,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.236559139784946) internal successors, (832), 372 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 832 transitions. [2021-07-09 17:39:38,350 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 832 transitions. Word has length 20 [2021-07-09 17:39:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:38,350 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 832 transitions. [2021-07-09 17:39:38,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:38,350 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 832 transitions. [2021-07-09 17:39:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:38,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:38,350 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:38,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 682 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5990 [2021-07-09 17:39:38,551 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:38,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2010156231, now seen corresponding path program 682 times [2021-07-09 17:39:38,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:38,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890189467] [2021-07-09 17:39:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:38,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:38,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890189467] [2021-07-09 17:39:38,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890189467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:38,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20057004] [2021-07-09 17:39:38,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:38,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:38,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:38,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:39:38,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:39,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20057004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:39,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:39,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:39:39,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798059737] [2021-07-09 17:39:39,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:39:39,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:39,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:39:39,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:39,277 INFO L87 Difference]: Start difference. First operand 373 states and 832 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:40,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:40,524 INFO L93 Difference]: Finished difference Result 462 states and 976 transitions. [2021-07-09 17:39:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:39:40,524 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:40,525 INFO L225 Difference]: With dead ends: 462 [2021-07-09 17:39:40,525 INFO L226 Difference]: Without dead ends: 421 [2021-07-09 17:39:40,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1458.7ms TimeCoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:39:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-07-09 17:39:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 374. [2021-07-09 17:39:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.2359249329758715) internal successors, (834), 373 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 834 transitions. [2021-07-09 17:39:40,528 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 834 transitions. Word has length 20 [2021-07-09 17:39:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:40,528 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 834 transitions. [2021-07-09 17:39:40,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 834 transitions. [2021-07-09 17:39:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:40,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:40,529 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:40,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 683 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6003 [2021-07-09 17:39:40,729 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:40,729 INFO L82 PathProgramCache]: Analyzing trace with hash -876135871, now seen corresponding path program 683 times [2021-07-09 17:39:40,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:40,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860522501] [2021-07-09 17:39:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:40,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:40,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860522501] [2021-07-09 17:39:40,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860522501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:40,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498715738] [2021-07-09 17:39:40,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:41,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:41,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:41,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:39:41,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:41,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498715738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:41,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:41,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:39:41,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055669835] [2021-07-09 17:39:41,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:39:41,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:41,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:39:41,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:41,387 INFO L87 Difference]: Start difference. First operand 374 states and 834 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:41,905 INFO L93 Difference]: Finished difference Result 394 states and 865 transitions. [2021-07-09 17:39:41,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:39:41,905 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:41,906 INFO L225 Difference]: With dead ends: 394 [2021-07-09 17:39:41,906 INFO L226 Difference]: Without dead ends: 387 [2021-07-09 17:39:41,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 821.5ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:39:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-09 17:39:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 377. [2021-07-09 17:39:41,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.234042553191489) internal successors, (840), 376 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:41,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 840 transitions. [2021-07-09 17:39:41,909 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 840 transitions. Word has length 20 [2021-07-09 17:39:41,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:41,909 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 840 transitions. [2021-07-09 17:39:41,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 840 transitions. [2021-07-09 17:39:41,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:41,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:41,909 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:42,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 684 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6015 [2021-07-09 17:39:42,110 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:42,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:42,110 INFO L82 PathProgramCache]: Analyzing trace with hash -578082913, now seen corresponding path program 684 times [2021-07-09 17:39:42,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:42,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816617519] [2021-07-09 17:39:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:42,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:42,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816617519] [2021-07-09 17:39:42,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816617519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:42,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562377849] [2021-07-09 17:39:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:42,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:42,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:42,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:39:42,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:42,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562377849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:42,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:42,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:39:42,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550185628] [2021-07-09 17:39:42,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:39:42,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:42,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:39:42,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:42,835 INFO L87 Difference]: Start difference. First operand 377 states and 840 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:43,414 INFO L93 Difference]: Finished difference Result 403 states and 876 transitions. [2021-07-09 17:39:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:39:43,414 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:43,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:43,415 INFO L225 Difference]: With dead ends: 403 [2021-07-09 17:39:43,415 INFO L226 Difference]: Without dead ends: 378 [2021-07-09 17:39:43,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 937.0ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:39:43,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-09 17:39:43,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 376. [2021-07-09 17:39:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2346666666666666) internal successors, (838), 375 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 838 transitions. [2021-07-09 17:39:43,418 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 838 transitions. Word has length 20 [2021-07-09 17:39:43,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:43,418 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 838 transitions. [2021-07-09 17:39:43,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 838 transitions. [2021-07-09 17:39:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:43,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:43,418 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:43,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6030 [2021-07-09 17:39:43,619 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:43,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:43,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2063931009, now seen corresponding path program 685 times [2021-07-09 17:39:43,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:43,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130308160] [2021-07-09 17:39:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:43,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:43,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130308160] [2021-07-09 17:39:43,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130308160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:43,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574588411] [2021-07-09 17:39:43,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:43,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:39:43,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:44,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574588411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:44,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:44,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:39:44,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876900238] [2021-07-09 17:39:44,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:39:44,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:44,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:39:44,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:44,298 INFO L87 Difference]: Start difference. First operand 376 states and 838 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:44,792 INFO L93 Difference]: Finished difference Result 392 states and 861 transitions. [2021-07-09 17:39:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:39:44,793 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:44,793 INFO L225 Difference]: With dead ends: 392 [2021-07-09 17:39:44,793 INFO L226 Difference]: Without dead ends: 379 [2021-07-09 17:39:44,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 822.1ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:39:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-09 17:39:44,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 377. [2021-07-09 17:39:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.234042553191489) internal successors, (840), 376 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 840 transitions. [2021-07-09 17:39:44,796 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 840 transitions. Word has length 20 [2021-07-09 17:39:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:44,797 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 840 transitions. [2021-07-09 17:39:44,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:44,797 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 840 transitions. [2021-07-09 17:39:44,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:44,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:44,797 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:44,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6042,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:44,997 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:44,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:44,998 INFO L82 PathProgramCache]: Analyzing trace with hash 486589279, now seen corresponding path program 686 times [2021-07-09 17:39:44,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:44,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416471790] [2021-07-09 17:39:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:45,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:45,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416471790] [2021-07-09 17:39:45,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416471790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:45,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701200101] [2021-07-09 17:39:45,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:45,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:45,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:45,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:39:45,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:45,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701200101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:45,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:45,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:39:45,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574115720] [2021-07-09 17:39:45,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:39:45,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:45,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:39:45,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:45,795 INFO L87 Difference]: Start difference. First operand 377 states and 840 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:46,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:46,654 INFO L93 Difference]: Finished difference Result 416 states and 900 transitions. [2021-07-09 17:39:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:39:46,654 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:46,654 INFO L225 Difference]: With dead ends: 416 [2021-07-09 17:39:46,654 INFO L226 Difference]: Without dead ends: 405 [2021-07-09 17:39:46,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1217.2ms TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:39:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-07-09 17:39:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 378. [2021-07-09 17:39:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.2334217506631298) internal successors, (842), 377 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 842 transitions. [2021-07-09 17:39:46,658 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 842 transitions. Word has length 20 [2021-07-09 17:39:46,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:46,658 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 842 transitions. [2021-07-09 17:39:46,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 842 transitions. [2021-07-09 17:39:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:46,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:46,658 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:46,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 687 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6054 [2021-07-09 17:39:46,859 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:46,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:46,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1821180609, now seen corresponding path program 687 times [2021-07-09 17:39:46,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:46,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177494011] [2021-07-09 17:39:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:47,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:47,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177494011] [2021-07-09 17:39:47,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177494011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:47,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398275797] [2021-07-09 17:39:47,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:47,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:39:47,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:47,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 17:39:47,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:47,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398275797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:47,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:47,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:39:47,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042253179] [2021-07-09 17:39:47,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:39:47,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:47,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:39:47,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:47,554 INFO L87 Difference]: Start difference. First operand 378 states and 842 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:48,453 INFO L93 Difference]: Finished difference Result 434 states and 931 transitions. [2021-07-09 17:39:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:48,453 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:48,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:48,453 INFO L225 Difference]: With dead ends: 434 [2021-07-09 17:39:48,454 INFO L226 Difference]: Without dead ends: 408 [2021-07-09 17:39:48,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1147.7ms TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:39:48,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-07-09 17:39:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 377. [2021-07-09 17:39:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.234042553191489) internal successors, (840), 376 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 840 transitions. [2021-07-09 17:39:48,457 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 840 transitions. Word has length 20 [2021-07-09 17:39:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:48,457 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 840 transitions. [2021-07-09 17:39:48,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 840 transitions. [2021-07-09 17:39:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:48,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:48,457 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:48,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6066,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:48,658 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:48,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:48,658 INFO L82 PathProgramCache]: Analyzing trace with hash 689374265, now seen corresponding path program 688 times [2021-07-09 17:39:48,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:48,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424806570] [2021-07-09 17:39:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:48,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:48,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424806570] [2021-07-09 17:39:48,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424806570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:48,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319307577] [2021-07-09 17:39:48,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:48,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:48,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:39:48,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:49,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319307577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:49,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:49,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 17:39:49,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144420208] [2021-07-09 17:39:49,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:39:49,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:49,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:39:49,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:49,335 INFO L87 Difference]: Start difference. First operand 377 states and 840 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:49,862 INFO L93 Difference]: Finished difference Result 395 states and 868 transitions. [2021-07-09 17:39:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:39:49,862 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:39:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:49,863 INFO L225 Difference]: With dead ends: 395 [2021-07-09 17:39:49,863 INFO L226 Difference]: Without dead ends: 388 [2021-07-09 17:39:49,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 865.7ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:39:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-07-09 17:39:49,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 378. [2021-07-09 17:39:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.236074270557029) internal successors, (843), 377 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:49,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 843 transitions. [2021-07-09 17:39:49,867 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 843 transitions. Word has length 20 [2021-07-09 17:39:49,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:49,867 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 843 transitions. [2021-07-09 17:39:49,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:49,867 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 843 transitions. [2021-07-09 17:39:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:39:49,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:49,867 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2021-07-09 17:39:50,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6081,689 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:50,068 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:50,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:50,068 INFO L82 PathProgramCache]: Analyzing trace with hash -963579109, now seen corresponding path program 689 times [2021-07-09 17:39:50,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:50,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070609789] [2021-07-09 17:39:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-07-09 17:39:50,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225378454] [2021-07-09 17:39:50,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:50,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:50,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:50,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:39:50,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:50,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6096 [2021-07-09 17:39:50,306 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 17:39:50,307 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:39:50,309 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 17:39:50,309 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:39:50 BasicIcfg [2021-07-09 17:39:50,309 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:39:50,309 INFO L168 Benchmark]: Toolchain (without parser) took 842369.96 ms. Allocated memory was 205.5 MB in the beginning and 375.4 MB in the end (delta: 169.9 MB). Free memory was 185.4 MB in the beginning and 135.7 MB in the end (delta: 49.7 MB). Peak memory consumption was 221.8 MB. Max. memory is 8.0 GB. [2021-07-09 17:39:50,309 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 205.5 MB. Free memory is still 186.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:39:50,309 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.58 ms. Allocated memory is still 205.5 MB. Free memory was 185.3 MB in the beginning and 183.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:39:50,309 INFO L168 Benchmark]: Boogie Preprocessor took 23.14 ms. Allocated memory is still 205.5 MB. Free memory was 183.8 MB in the beginning and 182.8 MB in the end (delta: 956.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:39:50,309 INFO L168 Benchmark]: RCFGBuilder took 316.25 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 161.3 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:39:50,310 INFO L168 Benchmark]: TraceAbstraction took 842008.42 ms. Allocated memory was 205.5 MB in the beginning and 375.4 MB in the end (delta: 169.9 MB). Free memory was 160.9 MB in the beginning and 135.7 MB in the end (delta: 25.2 MB). Peak memory consumption was 196.7 MB. Max. memory is 8.0 GB. [2021-07-09 17:39:50,310 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 205.5 MB. Free memory is still 186.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.58 ms. Allocated memory is still 205.5 MB. Free memory was 185.3 MB in the beginning and 183.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.14 ms. Allocated memory is still 205.5 MB. Free memory was 183.8 MB in the beginning and 182.8 MB in the end (delta: 956.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 316.25 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 161.3 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 842008.42 ms. Allocated memory was 205.5 MB in the beginning and 375.4 MB in the end (delta: 169.9 MB). Free memory was 160.9 MB in the beginning and 135.7 MB in the end (delta: 25.2 MB). Peak memory consumption was 196.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 841925.3ms, OverallIterations: 696, TraceHistogramMax: 5, EmptinessCheckTime: 202.6ms, AutomataDifference: 388389.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19752 SDtfs, 43165 SDslu, 170358 SDs, 0 SdLazy, 279408 SolverSat, 16480 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 107682.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25555 GetRequests, 7885 SyntacticMatches, 1 SemanticMatches, 17669 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86921 ImplicationChecksByTransitivity, 490425.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=378occurred in iteration=693, InterpolantAutomatonStates: 12015, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1534.7ms AutomataMinimizationTime, 695 MinimizatonAttempts, 25453 StatesRemovedByMinimization, 682 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2719.5ms SsaConstructionTime, 11125.5ms SatisfiabilityAnalysisTime, 285398.3ms InterpolantComputationTime, 25627 NumberOfCodeBlocks, 25627 NumberOfCodeBlocksAsserted, 2440 NumberOfCheckSat, 24244 ConstructedInterpolants, 2 QuantifiedInterpolants, 411893 SizeOfPredicates, 7469 NumberOfNonLiveVariables, 66761 ConjunctsInSsa, 24623 ConjunctsInUnsatCore, 1383 InterpolantComputations, 7 PerfectInterpolantSequences, 1779/20205 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown